A friend and I would like to see Yellowstone NP next summer (2014). While I don't mind driving across country (did it in 2010), she seems a little reluctant. Neither of us are spring chickens so if we could find an inexpensive alternative way to get there it would be nice. And, while this is ROAD TRIP America, does anyone have any suggestions other than Amtrak? Amtrak is certainly cheap enough but the closest we can get is Salt Lake City with arrival there at 11:05 PM. Only buses I could find were tours and we don't need a tour, we just need a way from here to there. It's difficult for one person to do all the brainstorming so any suggestions would be very much appreciated. Thanks much!