Have you had the chance to get boots on the ground in any of them (even if just hiking)? With only a 4 day window, especially at the end of the season, I would favor locations you're already familiar with. Simply knowing the terrain can give you a massive advantage in the high country.
If this will be your first time to any of the areas, I would pick a spot that gives you relatively easy (i.e., on a trail) access to open country where you can get set up on a high point and glass. You're likely to see other hunters, but that's the nature of the beast...