Good gracious! I like your thoughts Nogrod! Most of them, anyhow.
I really like the Fs and the slaves setting up some sort of ambush. That would be a good way to use their advantageous numbers and help get rid of a few of the slavers from the very get go.
However, about the orcs staying around. . .I would think that after having robbed all that they could carry, they would get out of their as quickly as possible. They don't want to stick around and run the risk of getting caught again. I think in their situation, they'd take only what they could carry, maybe (since they're orcs) destroy the rest, if they could do so safely, and then run off. But they're fairly smart- they won't do anything terribly unsafe. And I think that the slaves would really appreciate it if they didn't destroy the rest of the goods.
-- Folwren