Adam
Like someone else said above: Lay out all the stuff you normally take into the woods, then figure out what equipment you actually use. Now if you are going into unfamilar land all the time, you will need some things that most people do not need (survival gear). Once you know what you have to have with you, it's easier to get the right sized pack. I always use a large fannypack with shoulder straps, like other guys have said. Get one that you can strap other gear to also. No need to put a heavy coat and bibs inside your pack, just lash it to the outside. If rain is a concern on the walk in, you can add a rainfly to the outside too. Once you get the gear down to the fanny pack size, you will find it easier to strap on your stand and such, or to strap your fanny pack onto the stand. Good luck, BTW, I just picked up a nice one from bruzergear on ebay for $40.
Dandbuck