I'm with HL on three separate ponds..One for SMB and YP, one for LMB and BG, and one for Catfish.
If you have regular BG, you almost certainly need LMB. Then the LMB makes it hard for the SMB to flourish. You could go with HBG, but I don't know what/how it would work in a pond of 6 acres in regards to restocking them and keeping their spawns under control. I would be leary on putting in BG in so early unless the guys here think its ok. Depends on your ultimate goals of which species of fish you want to do best.
It will be interesting to see what the pros say...