I usually break it down into two groups, necessary and nice (comfort). My go bag always has the necessary items in it, I add comfort items as anticipated. Most of my hunts are less than 12 hours. I was in a recon unit in the Army for awhile, we got used to doing without. What you think you'll need and what you actually need may vary.
Most times for me it isn't camping, I move into an area as quietly as possible and move as little as possible. Other than scent, movement and noise will bust you quick. Stands to reason I rummage through my pack as little as possible. I've been busted by my open jacket zipper halves rubbing together, Deer have good ears and key on unnatural sounds. The stupid Deer die first.