OOC:
Just an idea, but when we decide where to go, in addition to trashing the catapult, we could burn the tower. The inside and floors are wood, and it would make the place unusable. And if we have to come back through here, it would likely be occupied again, and one would assume they wouldn't be so lax next time.
Just an idea. Drawback is that it would totally pinpoint where we are, but if we know where we are going, it might draw some opposition away.
Just an idea. Not well thought out, but an idea, nonetheless.