I was someone who's backpack was filled, and still felt as if I didn't have enough stuff. Then, after a day of hunting, I realized most of the items in the pack was not needed.
I then read an article by Mickey Lotz(Ferrett) about the minimalist approach, and it hit home. My hunting is all done as a day trip, no more than an hour away from home, so this probably doesn't apply to those going away to camp. Now, though, I just have a fanny pack with food, water, and some esentials. Everything else goes in pockets. It has really made it more enjoyable, and made me more mobile while ground hunting.
Maybe Mickey can chime in here, since he was my model as far as what is actually needed.
Lee