I was up there a few weeks before I sold you that flat-bottom. Caught one little dink, but there are some good fish in there. The locals were telling me to throw "anything white", but depending on the conditions, I would try frogs and plastic worms around all of that vegitation. Buzzbaits and spinnerbaits along the edge.
Out in the middle there were some deep spots that might produce with a jig. I didn't have enough time to try it.
Another guy was telling me that he fishes it with minnows for crappie and does pretty good at it.
Good luck with it.