Travel to some remote areas out west in states like Idaho and Montana. Make friends with some of the locals and pick their brains. The Salmon River valley in Idaho would be a good reference point.
Those folks live self-sufficiency out of necessity and you could learn a lot from them.
That being said, if society collapses to the point where we need to retreat and live off the land, I doubt any of us would be long for this world. Centuries of reliance on aggressive and advanced medical treatments have left us with inadequate immune systems.
I am hoping if I don’t survive that my children and their decedents will....it is really for them I feel I need to create this as an insurance plan
It is a shame it is always the kids that have to pay.