Self sufficient rural farming or mining communities are not really a thing any more. They are dependent on manufactures from outside like tools, fuel and other equipment. Rural folk in my country like to pretend self-sufficiency but they drive trucks made elsewhere on roads built by non-local labor and paid for by municipal or state funds to buy things made in other countries at stores in other towns. When people are honest about the inputs to processes on which they depend, they are more open to cooperation.