I haven't read all the threads, but i have included in my own selection is a bolt action rifle in 22LR shooting subsonics. I can hunt small game and not attract attention with the 'sonic boom' a bullet traveling faster than the speed of sound will create.
I also have a bunch of Berkey water filter bottles that like the ones the UN passes out to remote villages in Africa for drinking from their polluted rivers, etc.
In a shtf situation, you need shelter first, then water, and then food. learn how to make a lean to, how to start a fire without matches, and how to not be visible on a horizon in the middle of night. Stay holed up in the day, and have friends and neighbors you can trust who can watch each others backs in your neighborhood or out in the wilds.