I also can't stop thinking about what they are doing to do when all the trappings of modern society start to break down, like sheets and blankets. They don't last forever, what are they going to do when they are all in tatters and unusable....grow cotton, learn how to spin and weave? They are completely reliant on everything that existed before that they can no longer create themselves...antibiotics, clothes, shoes, guns and bullets, fences and wire. They can't go and live in a cave and go back to hunting and gathering lifestyle because the zombies will eat them.
I think I over think this show