Would a few in deeper water be a good idea so the BG have a place to hide as the water cools? Maybe the predation is not that great in the winter?
I don't know, just asking.
Yes...but I don't totally understand the dynamics of GA water temps and how they relate to movement of BG - so I'd leave that to others. Certainly you don't want to raise a ton of forage only to leave them in barren deep water getting hammered all Winter. Of course, I do this purposely to help manage my BG population...less cover the better - but our goals are inverse.