I hunt in CO and northern MN, so the pack adjusts accordingly but the staples would be:
Thermos of coffee
Camel back bladder built into pack with water
Field dressing kit (knives, sharpener, gloves)
550 cord
Lighter
Compass
Chapstick
USB battery bank
Headlamp
Snacks in ziplock back (loud original wrappers removed from whatever it may be)
Scent eliminator spray
Game call(s)
Extra socks
Hand warmer packs
Zippo hand warmer
Snot rag
Flask and celebratory stogie tucked away...