He is traveling by himself. He said he did not book a sleeping berth. He's taking his Nook and an atlas and he's going to see America by train. He did say that if he didn't like the first two legs of the trip, he would fly home from New Orleans. :)
I don't know if spending a week on the train is something I would especially like to do, but I think it sounds pretty cool. I can't wait to hear about his trip when he gets back!
If you don't know the song City of New Orleans, check out this version by The Highwaymen (that's Willie Nelson, Waylon Jennings, Johnny Cash and Kris Kristofferson.)