I really don't carry a pack.
I carry in my pocket:
knife
cell phone
flashlight
grunt call
coyote call
bow hook
thin hoist rope
sometimes my camera
and binos around my neck!

I used to carry in with me on every hunt all things I "might" need, not any more! I have a separate cleaning pack that I'll go back to the truck and get once I shoot a deer, no matter how far the walk! This gives the deer time to expire and I can drop off stuff I DON"T need while I clean then drag my deer out! This cleaning pack has an extra flashlight, water, towel, saw, drag rope and cleaning gloves.