Looting a campsite changes its contents
I returned to a hex where I had my campsite (a burnt out apartment) and noticed that the option for scavenging appeared. Thinking it was a new place, I looted it, only to find that it was my own campsite! The following had changed to it:
* Big stacks of string, screws, etc. reverted to one-item stacks.
* Contents of containers were randomized. I lost so much medicine this way!
* Some items disappeared, but others remained. A lean-to and sleeping bag remained, but bottles of water disappeared.
* A couple of new items appeared (e.g., jeans).
The stuff was in the campsite, not on the ground, so it was definitely the campsite that was changed. I now know to never loot a hex that contains my campsite! :)