Thanks for the information. The wife and I will have to head up to the north part of the state to give it a try. Will make sure to bring the camera and a couple of memory sticks, it looks and sounds like a worthwhile experience.
I would get up through there before it gets too late in Septembet. Late September and early October the snow could easily fly up in that high country.
The main road is not too bad, but most of the spurs are truly primitive roads and will require 4-wheel low.
My son and I drove up form the Boise area (Emmett) and really, really enjoyed ourselves...just wished we had had a whole week to spend...it is more than deserving of that much time.