We have been camping up in Idaho off US 12 since the early 70's. Used to cross country ski up there, have camped in the TC and the Fiver many times. Never disappointed. Lots of official Forest Service campgrounds not too far off the highway, and countless spots for a TC to camp. Fantastic mountain biking.
Before the wolves took over, we used to see elk and moose crash across the side roads ahead of us all the time. On hikes, we have come within ten feet of bull moose. He seemed embarresed that we got that close before he detected us, and we were delighted that he chose to run.
There are places up there where one can get near the top and look off to the great distant horizon and see nothing but unbroken mountains and forest. It is a special place.