@WrongOnTheInternet Speaking of, in such a large dungeon, you might want to use a technique called Gating that's used in video games. You move forward, and the area behind you becomes cut off to you somehow. This helps assure people they're going in the right direction. Could be done at a few points in a few points:
- have a trial and then the room begins to collapse, and the only way out of it is forward.
- a troll shuts those big heavy doors and bars them from the other side, oh no! though this might be equally tempting to smash down.