IMO, the train offers larger passengers the best opportunity for comfort on a LD trip, but he Superliner steps can be a challenge for some. If it agrees with your budget, the H room on the lower level should offer plenty of space. My wife and myself are not large waist people but we have a different problem. She's 6' and I'm 5'11. The lower bedroom bed is just barely long enough for her. When we use to fly, the lack of knee room was very uncomfortable and the seats are now only about 19" wide and that's sports car seat size!!!. Now the airlines want larger people to pay for two seats. That's rather kind of them wouldn't you say?