Try the Road Atlanta website
https://www.roadatlanta.com/fan-guide/accommodations
That would be a start, also check out Classic Motorsports and watch depending on when you come down, the past couple years on the Friday, they have been doing a drive from Atlanta (Porsche Center to Road Atlanta) and from Chattanooga (Coker Museum)
I have stayed at a marriott that was about 20 miles away, would take you about 30-45 minutes to get to the track...
good luck