I used to hunt with a fanny pack as I overheated with a back pack. Now I use both the Badlands Hypervent and Sacrifice, that allow for breathing across the back keeping me cooler, but allowing for better distribution of weight. I also hunt in a bone out and pack area so like a pack big enough to allow me to pack a good load of meat out when I have an animal down.
I probably carry more than most in a day hunt than most.