These seemingly abandoned Campsites are scattered through out the map, each one is next to a makeshift dock. In each one there are unfamiliar symbols, these symbols are more visible to the player in the Twisted Strand and Stellar Basin camps.
Story
The following information contains spoilers regarding the story or ending of the game. Discretion is advised.
After speaking to the Lighthouse Keeper about the Old Mayor, the fire at each campsite will be lit. The Old Mayor can be encountered at any of these sites. Once the player talks to the Old Mayor, the fires will once again extinguish, and the Old Mayor will disappear forever. At this point in the game, it becomes clear that all the camps all belong to the Old Mayor.