Just watched the video. That looks like an awesome trail. Switchbacks don't look all that bad, not any worse than Black Bear Pass anyways. I could see if muddy it would be more problematic. I'll have to put that one on the list as we get over the Beartooth highway quite a bit.
Thats the video I watched that made me create this thread. It looks very interesting to me. To go that far though I would have to add some fly fishing to it. I know I could always hit Yellowstone but I would like to see what they have up there.