If I was my alter-ego, I'd don my mithril armor, grab my bow, and sword, bar the door and call for help. At the barred door I would wait, for either the Orcs to make a move, or my assistance to arrive (in the form of Elladan, Elrohir, and a detachment of Rangers and Rohirrim).
If I were myself... I would pray really hard - and call some friends of mine. I'd don my Mongol armor (which would be completed by then), and get all the heavy weapons fighters in Trimaris (SCA kingdom) to come help me fight... the marshall who's training me would bring his collection of weapons... give me a sword and shield, and he'd kick some serious orc butt with his glaive.
Oh, and get the SWAT team to come out.... I'm sure that between the medieval-style heavy weapons, and the SWAT guys, we could take out the orcs... or, just throw a bomb in the middle of them, and while they're standing around wondering what it is, the explosive blows up, and all the orcs can wave bye bye.
-Elrowen