There is nothing legal real close to Clayton County, the closest trails would be Durhamtown out I20 East past Oconee, Morris Mountain in Hephlin Al., or Forestry Roads up in North Ga.
We also practice "Tread Lightly"
http://www.treadlightly.org/page.php/tread-principles/ of which a major principle is "When possible, avoid wet, muddy trails"
Our ORV trails are under attack by organizations that want them closed due to erosion and other reasons, and we have already lost the best trail system in the Eastern U.S. All reputable off-road groups support the same positions we do, and we condemn and report all illegal activity. Please check out SFWDA
http://www.sfwda.org/ and The Blue Ribbon Coalition at
http://www.sharetrails.org/.
I hope you take a moment to visit these websites, and join us in practicing responsible wheeling.
Welcome to the Forum, look forward to meeting up with you on the trails.