Arches is accessible. Even if you have problems with mobility, there are things to see and do. I have been here twice and am planning my next trip.
You've set your sights on seeing a lot at the peak of summer heat and visitation. Not sure what your route will be or if you're counting the three days to get there in your total of eight days or not. Guessing you'll take... More
You've set your sights on seeing a lot at the peak of summer heat and visitation. Not sure what your route will be or if you're counting the three days to get there in your total of eight days or not. Guessing you'll take I-40 to I-20. I'd suggest your first stop is Zion and the last is Monument Valley. From Tallahassee (which I randomly picked), that would be about 2,000 miles or 30 hours to Zion, and 1,860 miles or 27 hours back from Monument Valley. Utah is isolated and not very developed, so sometimes you have to go long distances because of where the roads are. A couple of other notes: at that time of year, you can only access Zion's main valley through the NPS bus service, so it'll probably end up taking longer than you anticipate. Monument Valley isn't a national park as it's on Indian land. It's well worth seeing, but the road is unpaved and sometimes difficult. We almost got stuck there. After Zion, your order is probably Bryce, Capitol Reef, Arches, Canyonlands, and Monument Valley. Given your distance, I personally think you have too much planned for your timeframe and won't get to see any of it very well. Having said that, two other places we really enjoyed were Goblin Valley State Park (which has these amazing formation as featured in the movie Galaxy Quest), and Dead Horse Point State Park, which is right next to Canyonlands and is like a miniature (although still huge) Grand Canyon. Since Utah isn't very developed, it's skies are pretty dark in most places for your stargazing.