Flagship fishery? If you can get low water, the Chattahoochee is chock full of shoal bass right now.
USGS Current Conditions for USGS 02335815 CHATTAHOOCHEE RIVER BELOW MORGAN FALLS DAM, GA
Monitor that gauge. The place to fish is called the Devil's Racecourse.
Here's a map:
I would plan to walk in from Akers' Drive. You'll pass a big water wheel at the base of the hill - the Parks Service road is at the very top on the left after an apartment complex entrance. You'll need to walk down a steep hill and then back up so plan accordingly, but that will put you on the fishiest water in the area. I would bring a 5 weight and small clouser minnows. Strip those relatively slowly across the shelves you'll see. Don't throw at a shelf per se, but rather dance a fly across it so it is broadside on to the fish. They hide under the shelves.