Quote Originally Posted by torstan View Post
I can see the problem with bringing over a full army. I'm more concerned about a few good climbers coming over and opening the gates from inside. I guess a loosely manned fortification along the crest of one of the cliffs would discourage any scouts coming from that side, along with some spikes dug into the rock.
Why not let that be one of the things the PCs have to solve? They learn that the mountain approach is a weak point of the defenses, and they have only hours to implement a solution.