Athens to Elbert Boat Ramp:

Take GA-72 through Hull, Colbert, Comer, Carlton into Elberton.
As you leave Elberton, watch for GA-72 to turn left towards Calhoun Falls.
In about 12 miles, turn left on to poorly marked road to the Elbert Boat Ramp. (A sign for a state park is on the right hand side of the road.)
If you cross the bridge, you missed it.  Turn around and take the first right after the bridge.