Before making any decision, I would like to ask the general that when they are expecting the enemy and how good is their intel. Reasoning behind this is that the army could camp outside the fortress for sometime while Kyoss and Irene explores the central courtyard.
I can answer this immediately. I think I wrote it in an update around #65 or so, but maybe it was not perfectly clear. The intel is rather decent, they have a LOT of scouts in all northern Eskal. They are expecting the enemy to strike seriously starting next year. They think the enemy is still gathering forces right now. Of course it could be wrong, but that is considered as rather low probability.
But there are other concerns as well, such as the morale of the soldiers, which could take a hit if the general acts in a way that supports the rumors and old superstitious legends about this place.
Still it is your suggestion to make (and a suggestions it is, no guarantee it will be followed)