And even without anything but memory, it's kinda easy to find the right path once you're down a ground level, so to speak.<br/><br/>Just enter a hole, and if it branches into a half dozen paths in about as many feet, you're in the wrong tunnel. If nothing else, the group as a whole is good at closing those tunnels that would give the monsters more room or worse, better accessibility to the camp.<br/><br/>They're still working hard, digging, setting up timbers, and so on, when you arrive down there. It's amazing what some hope can do for you.