I have a small pack that I always take with me no matter where and how I hunt. Inside I have the following...
- Rain Gear
- gloves
- Windicator
- 4 glow sticks
- flash light
- GPS
- extra batteries for items that require them
- drag harness with rope
- hand/feet warmers packs (when it's cold)
- extra ammo (mostly an extra load vile for my ML)
- either several bottles of water or a CamelBack reservoir
- ThermaCell with refills
- scent-free hand wipes
- skinning knife
- extra pair of socks
- survival gear just in case (sewing kit, signal mirror, fire starting kit)
- assortment of plastic bags
- electrical tape
I've had to use all of those items at least once.