D. Logan, I came to my skills through early experiences, academic training in botany, and a ridiculous amount of motivation that helped me work through failures. Constant failures--learning by trial and error is a very inefficient way to learn. Many people consider this form of learning superior, but if you experiment 50 times and finally get it right on the last one, you have knowledge of 49 ways to fail. Survival and surthrival are about succeeding. I would much rather learn from a mentor and have 50 successful attempts under my belt. Life isn't long enough to relearn everything from scratch. We will never reach actual competency in wild living that way. So, back to your question. I spent a lot of time reading what I can about indigenous methods of performing various tasks and trying to replicate those experiments. My knowledge has been garnered from 100s of sources. My mentors are primarily
books and research articles, some on wild food nutrition, others on medicine, others on hunting weapons, others on fiber arts, bark containers, basketry, adhesives, etc., etc. No one book has it all in one place. You will eventually learn which authors are just repeating the same old stuff and which ones have actual
experience with what they are discussing. Find those and follow them (whether it be in person or via the web). Learning from someone who can show you how to do it correctly is worth the time and financial investment because it ends up saving you tremendously in the long run. I realize I'm probably not giving you
the answer you hoped for, but I feel the same frustration you have experienced. At least I can spare my students from some of that "trial and error" annoyance. Best wishes.