My first inclination is to say you could fly into Boise and drive across scenic ID. The route north through Banks and Garden Valley, to Lowman and the lovely little town of Stanley in the Sawtooth Recreation Area is a wonderful drive. Near Stanley are the Sunbeam Hot Springs, Stanley Lake, Red Fish Lake and some ghost towns. The one which comes immediately to mind is Bonanza. Continue on to Challis and follow US-93 all the way north. It's a great roadtrip.
Lifey