Here is a helpful tip for your next outdoor adventure. Always keep a small SD card (or whatever your camera uses) labeled Survival in your camera case. On this card keep information in photos, that will help you in the event of an emergency.
Trail Maps, Area Maps, Photos of eatable plants, knot instructions, trap and snare diagrams, poisonous plants from that area, poisonous snakes...
The idea is to give your self any information that would help you in a dangerous situation. If your planing a trip, take the time to do a quick search for these things for that area, and then just snap photos of your computer screen. Most photographers will have plenty of batteries in there pack to keep a camera running for days so you can reference these photos at any time.
I also have made it a habit to take a photo of the trail map at the trail head before I head out, I have used this on several occasions to find my way back to my vehicle. I also put useful info on my card that I use as a photographer like tide information for the week I am shooting near the ocean, sun rise and sun set calendars, light meter calculators...
It always pays to be prepared for the worst even if you never need it. If you have other ideas for the SD survival card share them! You may help save a life. Be Safe!
and get out there!