Additional information to stockpile would be archery materials, books about design of the bow/crossbow and arrows, electronics and capacitors concerning producing a Gauss gun or rail gun, plan for gunpowder to be impossible to come by and even when you make your own, even repacking your own brass you still need a primer for those shells. Being able to hunt or defend yourself with a very quiet crossbow or any longer range with an electric Gauss gun that you can recharge with your energy source of choice can be a better plan than relying on conventional rifles. Agree completely with having a stockpile of scrap and tools, being able to reuse something either in its original purpose or a new one is invaluable. “Redneck ingenuity” can be a slur and a godsend at the same time.