I echo the thoughts of Shan and Tim. ALso you said you don't want to wipe out a good crappie fishery. WIth little bass at this point you will have a poor crappie fishery if you don't take them out, so yet another reason to remove all you catch. You will probably never get rid of all of them, but you can catch some slabs occasionally along with the preferred bass. If the bluegill population is reestablished consider adding some bass because if not you will by next year's spawn have a pond that is full of crappie that will not grow.
