Bawplank, sorry for your problems. You've gotten some great advise, and I think the focus should be on the replacement cost at today's prices. $25-40 per fish sounds like a lot, but it's only about $2500 - not even close to repaying you for what has happened. There's got to be a way to get that figure on up there!
The bass at $10 per pound is reasonable. How many did they take - 600/800 #s? Did they tear down any fences, trample up the landscape or traumatize any cattle?