You may think about adding a shed to store your supplies. The tarp is fine initially but if you can build houses I'm sure you can build a shed lol. Also don't know if it's my game or in general the shale, shells and rocks do not replenish. The storms should unearth precious materials like the metals and the special stones. Make sure each map has enough starting materials to build at least one of everything. For me Alpha had no clay and Hook didn't have enough metals to make a bronze tool let alone both.