We've had a place there since 1970 and the only crappie we ever catch during the summer months are off our dock on minnows 15-20 ft down. My buddy has a place on the Rock as well and they catch a good amount dropping a minnow to the bottom and slowly reeling it back up. I've seen him catch 30 a day doing that. Kinda depends on where your dock is because on our dock we hardly ever catch more than 10 a day. Some docks have crappie, some don't. Good luck!