I use a Golite poncho/tarp for tarp cover attached between either bushes or trees same as I've always done since the infantry. And a usgi poncho liner (woobie) as a blanket and a Recon 3 sleeping bag for the real cold nights. If the ground is hard I cover it with a good layer of natural bedding, depending on what's around. (palm, leaves, dirt, pine branches, etc) I tried carrying a tent, but it's not worth the weight to me and you're zipped up in it closed off from your surroundings. That fine in safe times, but shtf won't be safe times and you want to be able to react fast if someone tries to sneak up onto you and hear your surroundings. The worst environmental annoyance for me is bugs and I need a new bug head net right now.