RAH, in my humble opinion there is no simple, sure way to catch GC. They are unbelievably wary of any one approaching the shoreline. They are best caught when young and curious. After that, it gets a lot tougher. I just posted a video on YouTube pertaining to the problems of overstocking them and the difficulty in removing them. Be conservative when adding them to your body of water!
http://www.youtube.com/watch?v=ANYoX7vtXt0
