If you're traveling by air, you'll be coming/going through Eppley Airfield, located about 5 minutes north of downtown Omaha.  The airport is small (20 gates, 10 at each of 2 terminal satellites), check-in and security lines almost always move quickly, and parking is no problem at either the attached garage, adjacent surface lot, or remote economy lots.  Check-in is on the first floor, then take the escalator up to the gate area.  When arriving, head down the escalator to baggage claim.  No trains, moving sidewalks, or anything like that here!  Several rental car agencies have desks across from baggage claim, and most have cars on-site adjacent to the garage.  Many downtown hotels offer shuttle service to the airport, and a courtesy phone near baggage claim will help you contact your hotel.