Yeah, like Ken said, my mom goes all the time- she is afraid of flying. She leaves from NC and goes up near you and over to Denver.
I don't know where Yellowstone is (very bad with geography and too lazy to look it up) but if you go past Denver into Glenwood canyon it is supposedly beautiful. I think that's what Wisha was talking about. My mom said she wishes she had stayed on just to go through there everytime she goes. I literally teared when driving through there on the highway when we first went to Moab because it was so pretty. Even before Denver the train trip was beautiful from the pictures I saw. Through the plains looked a little boring though. No offense to plain folk.
It sounds like a once in a lifetime thing and I would definitely do it.
