1. First-aid kit
2. Compass and know how to use it
3. Map(s) of the area where you will be
4. Small functional pocket knife
5. Flashlight with good batteries (extras & bulb)
6. Raingear; parka and pants
7. Sunscreen
8. Extra food and water
9. Fire kit, waterproof container of matches, candle, etc.
10. Whistle

11. If you're flying over wilderness, a big ass gun.

I don't know if it's urban legend or not but I heard of a pilot who crashed
in the Rockies. He survived the crash but was pinned in the wreckage. A
nice family of bears came along and ate him.

Cheers,

BillC