Yo Yo's are awesome. We used to put them on set poles around my grandpa's pond and caught loads of fish. Down here we are required to check them every hour (I think) and cannot be out of hearing distance from them.

We had some set out on a big creek in South Arkansas when I was a kid and came back to find several only had the fish's heads left on them. Alligators and turtles took care of some pretty nice fish.