Well, I have only one contribution. As a life-long woodsmen who has often been hours from camp with minimal supplies, you can drink your urine in times of life and death. But you need to have socks. Then dig out some sand. Make a fire, make some coals. pick up some pebbles. Build a sock filter. Sand/Charcoal/Rocks. Pee and filter. What's left, you could drink for survival.