Just started, bear with me if i am mentioning something that already exists:
Fishing, A pool of frothing water might mean fish, harvest from the edge of the water or perhaps a boat - therefore need to be able to build boats. boats can also be used as a campsite.
Add Oil , to be harvested with a ‘something like a drill’, and stored in an oil drum. Oil powers generators, generators provide electricity, electricity powers lights, and maybe electric fences - sure it will attract raiders, but thats what the electrically powered auto turrets (with limited ammo) are for right?
As long as every build is defeatable it would be a good outcome.