There is 30 random wood and stone that spawns in the just try to keep moving in one direction at the start after 2 days they will spawn every it was 50 spawn every time but I thought that was too much so I made 30 the stone is pretty rare but it will spawn and they spawn after the shelter get destroyed and if don't see them on the ground check the top right corner it shows how much you have
Thanks For giving it a try thought