Hide tanning info would be good for the leather for moccasins. Need ways to do it primitively too without the chemicals if needed. Also info on butchering of animals and livestock for those that may not know it. Info for animals that you may have for breeding, health, feeding, etc. I have lots of info on goats, rabbits, and chickens for this if you need it.
Medical info for making do with supplies: sanitizing/making bandages, makeshift gurney, etc. Herbs for medical use, info for common illnesses (diabetes, asthma, etc)
Solar oven instructions and cooking, info on what NOT to do for each category too... sanitation and cleaning info things like using baking soda for cleaning, deoderant, etc. making lard, candles without lye, etc.