Hmmm, that is a hard one to answer. I love all of the ones you've listed plus one of my favorite places, MOAB!!! I also love more local to me and have several remote areas in San Bernadino National Forest that I/we go to. MOAB's wheeling is the best and the camping is great but you are still in town, so for the overall experience I'd have to say SBNF.
Oh one other place which puts you by Dusy/Ershim and several other trails is Dinky Creek, one of my favorite places to camp at.