Not sure I can answer that in a way that will help you. Looking at a AAA map - which I think I last used around 1996...
Looks like the last time, I probably did go through Atlanta. Going North from Milton Fla I hit Brewton Ala. and probably took US 31 to I 65 to I85 but don't recall.
From Horseshoe Bend I know I went North and picked up I20, probably use I285 around Atlanta to I85 North.
Another time, I recall staying further East. Went through Vidalia, so I must have been on US 1. At or before Waycross, headed SW, don't recall what roads I was on - probably wasn't sure at the time. LOL. Got onto I10 somewhere around Tallahasee.
Of course watched my speed and general appearence on the backroads of the southeast. Racing stripes and NJ or Pa plates are already two steps toward getting pulled over...