I catch Pikeminnow, and bait my traps for carwdads when I go to L.B.C. and Timothy. Tim never lets me down, always have absolutely stuffed pots. Up there if you have a kicktube, or pontoon, it is fun to troll through the mess of pot buoys and catch fish in the maze of lines.
On-line I saw a modified 5 gallon bucket that is used to catch large crawfish, simply like a giant milk jug that Chris mentioned. Just put it behind the water bug, and scare it in. Except this bucket had some fine plastic mesh in the shape of a cone shoved cone point down into the bucket. It is so the catch can easily shoot through backwards, but it is nearly impossible to crawl out. Seems kind of neat...