Thanks for your quick input. I had not thought of the train. I know the airports were difficult for her in the past, even with a companion. I can get her up the steps and into the bathroom in our RV as I can do it in a small bathroom, but the length of the drive is questionable. Right about in and out of sleep. That is typical for her but probably not a problem. What if she gets really uncomfortable and I CANT change transportation methods? But that is true no matter what we choose.
I've taken the train to Chicago in a bunk room and it was reasonably comfortable, although we had to go to the dining car for meals, maybe handicapped will bring meals though.
I'll take more advice before I decide and of course see if she thinks the train is an option. She seems game for the RV, she had ridden in it before but only on short trips and before she broke her leg.