Oh, castles, keeps, forts, etc...the bane of my existence. Since Shardpit is at the ass-crack of nowhere, I figured that House Tharashk wasn't given much of a budget, even for a dragonshard operation. The garrison isn't too big (can "reasonably" house 34 soldiers, two to a room), but the townsfolk are a hardy bunch and are expected to pick up arms in case they get attacked. That, and some of the houses could also be setup as impromptu barracks to house conscripts. I wanted to limit myself on this quite a bit, and make it feel cramped, as if they couldn't requisition sufficient funds to expand it. So access to the prison and kennel was added wherever they could shoehorn a room in.
The players will mostly deal with warped guards and dogs. Actually, I'm going to put half-eaten dogs in the kennel and have the rest be free-roaming (since they can teleport). The main objective here is getting into the prison, where there is a planar rift that can be sealed (sealing rifts weakens the end-boss and removes skill challenge failures). Some of the rooms contain tainted treasures taken from the shrine, and I'm also going to put in a byeshk weapon in the armory or sergeant's quarters to give the party an edge (it wont be carried since none of the warped citizens or soldiers could safely touch it).