Greg,
Do the successful crappie ponds you have seen also have BG?
There was a recent post by Mr. Willy that had an excellent link to a Missouri article that recommended to have a succesful small crappie pond, you should not stock other fish that might "distract" the LMB from keeping the crappie in check. This made a lot of sense to me. It essentially said that to have a good small crappie pond, you needed to have a crappie pond and not a LMB pond with crappie or diverse pond that included crappie. Does that fit your experience?