Welcome to the forum, crashdp!
Since you already know that SMB would have a hard time keeping BG numbers down, Black Crappie will be about 100 times harder for the SMB to keep BCP from overpopulating and stunting.
If you like both BG and BCP, consider using hybrids of both, plus Hybrid Striped Bass with about 300 more YP and about 500 Redear sunfish for snail/parasite control. I'd also suggest stocking Golden Shiners with your Fathead minnows.
Check your Private Messages....
