According to forum posts, the Brown Palace and The Oxford are frequently recommended for their classic appeal and proximity to downtown attractions. The Brown Palace is suggested for its historical significance and central location, making it a popular choice for visitors wanting to stay in a landmark hotel. The Oxford is favored for its proximity to Union Station and easy access to dining and bars.

For travelers looking for boutique hotel experiences, The Ramble Hotel was highlighted. In the Cherry Creek area, the Moxy Hotel is recommended for its proximity to cafes and shops, offering a more upscale and cushy stay. Travelers have called out the Hyatt Regency for its familiar standards and great bar, although parking rates are about $50 per day.

Some users suggested staying in the Lower Downtown (LoDo) or River North (RiNo) areas for those interested in exploring new cities, particularly if the interest includes breweries, food, and cultural activities like attending a Rockies game. These areas are noted for their vibrant nightlife and are conveniently located near major attractions.

According to forum posts, Denver offers a variety of outdoor activities that appeal to nature lovers and adventure seekers. Hiking is popular, with the Flatirons in Boulder recommended for drier trails and lush greenery in May, while Rocky Mountain National Park offers stunning mountain scenery, though higher trails may still have snow. The Garden of the Gods in Colorado Springs is highlighted as a worthwhile destination, known for its remarkable rock formations.

For those looking for structured outdoor activities, some travelers mentioned considering a Segway or jeep tour in Boulder or Colorado Springs. In Denver itself, City Park provides a scenic walking area, and the Rocky Mountain Arsenal was suggested for its proximity to the airport and natural beauty.

According to forum posts, Denver Airport hosts a variety of major car rental companies such as Enterprise, Hertz, National, Alamo, Thrifty, Dollar, Avis, and Budget. Some travelers have recommended Mile High Car Rental specifically for their AWD and 4WD vehicles, which are suitable for winter driving conditions.

For many users, the experience with these companies varies, often depending on the staff encountered during the rental process. Programs like Alamo's Insiders Program are suggested for potential discounts. Joining loyalty programs of companies like National is also recommended for efficiency.

Travelers have called out that specific vehicle types, such as AWD or 4WD, are crucial for winter travel to places like Rocky Mountain National Park. Companies like Mile High specialize in these types of vehicles. Some companies, like Sixt and Enterprise, allow you to book these specific vehicle types, although availability may vary and prices can be high during peak seasons.

The rental car locations are not directly at the airport terminal; a shuttle service is required to reach the rental facilities, which may take additional travel time, particularly noted by travelers to be around 10 minutes or more.

For travelers arriving internationally at Denver Airport, the process involves passing through U.S. Customs and Immigration. According to forum posts, after clearing customs, passengers recheck their baggage and proceed to TSA security screening before accessing their connecting flights.

Travelers have noted that there is a specific baggage recheck area for those with connecting flights immediately after customs. This prevents the need to go back to the main check-in area. After rechecking baggage, all passengers must go through TSA security screening again, as confirmed by multiple users.

Most domestic United flights depart from Concourse B, while international arrivals typically come into Concourse A. Forum contributors have mentioned the availability of an underground train that connects the concourses, aiding passengers in quickly reaching their connecting flights.

Some travelers have expressed concerns about the sufficiency of connection times. Experiences shared suggest that while the customs process can be quick, the necessity of rechecking baggage and undergoing security screening again can be time-consuming. It's recommended to have at least a 2-hour connection window to accommodate potential delays and the walking distance between concourses.

According to forum posts, popular neighborhoods to stay in Denver include Cherry Creek, LoDo, and the area around Union Station. Some travelers said Cherry Creek offers good shopping and proximity to attractions like the Botanic Gardens and City Park. LoDo was recommended for its proximity to live music and nightlife, and the area around Union Station is praised for easy airport access and a variety of dining options.

For travelers with families, neighborhoods like Sloans Lake and LoHi are suggested. Sloans Lake is noted for its safety and proximity to parks and fireworks displays during the Fourth of July. LoHi is recommended for its excellent food options and relative safety, though it is on a hill, which may be less convenient for walking.

Some users mentioned that the choice of neighborhood might depend on personal preferences and specific needs such as walkability, access to public transportation, and proximity to dining and entertainment options.

According to forum posts, shuttle services are a common transportation option from Denver to Breckenridge. Some travelers used companies like Epic and Summit Express, which offer scheduled rides from Denver airport directly to Breckenridge. The duration can be around 3 hours, and private shuttle options are also available, though more costly.

For those preferring public transportation, the Bustang bus service has been mentioned. It operates routes from Denver to Breckenridge, providing an affordable alternative to shuttles. The service is reliable and drops passengers near major locations, making it convenient for travelers.

Some travelers inquired about using Uber for this route, but the consensus suggests that the likelihood of finding an Uber willing to make the long trip is low due to the distance and reduced chance of securing a return fare. Renting a car is an alternative discussed, offering flexibility for travelers to manage their schedule and potentially explore the area.

According to forum posts, Denver International Airport does not offer onsite luggage storage facilities due to strict regulations. Travelers have noted that the nearest storage option is at a location across from Union Station in downtown Denver, accessible via a free train ride from the airport.

Some travelers mentioned that the Westin Hotel, which is attached to the airport, might provide luggage storage services but only to guests with a room reservation. This might not be a viable option for those not staying at the hotel.

Forum users have discussed third-party services like Bounce for luggage storage, with multiple drop-off points around the airport area. However, confusion exists regarding the exact locations within the airport, necessitating a call for clarification to the service provider.

According to forum posts, many users recommend taking the A Line train directly from Denver Airport to Union Station, which costs $10.50 and runs every 15 minutes. From Union Station, you can access the free MallRide shuttle for easy transportation around downtown Denver.

Some travelers mentioned that while Uber and Lyft do not have a pickup stand directly at Union Station due to bike lanes and valet areas, these services can be easily accessed by walking a short distance to a nearby hotel such as the Oxford Hotel. Additionally, travelers advised that taxis accept cash, unlike Uber and Lyft, which require app-based payment.

For those considering other options, it was suggested to take a train to Union Station and then use a taxi or Uber/Lyft for the final leg of their journey. This method provides a balance between cost-efficiency and convenience, particularly for those with luggage.