Here is a list of gear I would have on my back for a three day bivy hunt. I prefer the tent over a bivosac mainly for weather issues. If a storm comes in and rains for a period of time I like to be able to have a waterproof shelter for myself and my gear to wait out the storm.
Backcountry Gear:
Hunting Gear (Daypack Gear):
Clothing:
Food/Water:
Breakfast:
Lunch:
Dinner:
Snacks:
Misc.