Hm... I've posted two or three times on the topic. But in all likelyhood, I would stick to my original plan and lie besieged. Bring orcs, I don't think they'd be organised enough to have provisions to wait out a siege. And any assault would obviously fail: I would have plenty of boiling water at the ready!
Yes... that just might work.
I'm afraid to say that the army has yet to invade my town, and I therefore have not had the chance to hunt for female orcs. Perhaps it's better for my sanity this way.
Now that I think about it, the 200,000 would probably swarm around the street rather than just in my front lawn... My mistake.