if solitude ranks high on your list, the Bob Marshall Wilderness complex (Bob Marshall, Great Bear and Scapegoat) should fit the bill pretty darn well. planning a week hike won't be a problem, it's a vast area- there are some logistical hurdles just because the area is very under utilized and remote
I also rate the Absaroka Beartooths very highly, not as much solitude, but certainly not overrun be any stretch
I'm a little bias as I reside in Montana :) btw both of these areas have strong populations of grizzlies, so familiarizing yourself with bear protocol is a given
I do have the Wonderland Trail on my must do list, looks like a dandy
Mike

