You all aproached from the forests and climbed up the mountain far to the right of the entrance. The drawing is about as good as I can do and I think I screwed up explaining it. But that trench cuts in a great sprial around and up the entire mountain, forcing attacking troops to bottleneck if they intend to go the most direct route. The house itself is on a sperate outcropping and is reachable by a bridge or the perilous ascent from the other side which is what you all sound like you want to do.