I finally made out of the basement and sprint upstairs, only to be sent of to chase after the blunderbuss that Albrecht Kreug (now dead) had, handing off my magic hammer to the not dead Albrecht in the process.
After rounding the corner of the mansion (on my way back) I see three large Gores and an even larger War Gore coming over the top of the wall. Instinctively, I pull the trigger on the blunderbuss. The resulting blast injures each of the Gores. The fact that none of them were dead was rather dismaying but not nearly as much as watching three more Gores peek up behind the others.
After being severely damaged and losing my shield to the War Gore and his mighty axe, I ran back the manor yelling at Olver, and several guardsman to follow. Once inside we barred and barricaded all the entrances. I went upstairs with all of the people with ranged weapons did. Seeing the Gore that I had previously attacked I fired an arrow through his neck, severing his spinal cord and killing him instantly.
We spent a couple of days at the manor before departing so we could heal our wounds and salvage equipment of the departed. I manged to acquire a round shield from the guard house and the axe from the Gore that attacked me. As of yet we have kept the Dwarven Warhammer.