Campfires could be created almost everywhere a fire is burning, since that probably means that there's a group with all jobs inside. If someone had been dying, they could go looking for a campfire. Hmmmm... kill the members of this campfire, or exchange and barter for meals? This would be your choice (weather shifting is something to not imply but just in case).
In nightime(maybe), or whenever people think it's necessary, camps could spring up round the cook, the firemaker, the woodcutter, and a couple of warriors/mages/rangers/all. Obviously they would still have to be skeptical of combat, even thier own campmates may not be trusted. It would be forbidden to enter a POH, therefore innovative woodcutters could make log benches, crafters could make such things and tents, and thats basically how camping goes, while still remaining PvP.
PLayer influence on the world and market. This whole idea sounds rather complicated, but I will come right out with it. The amount of players in the world affects the sum of distinct tactics to get supplies, and there'll always be the pkers. Among the fact that this could be a survival universe, I would like to execute something many before have said.