Welcome to GA LOST!!!!!
Check around our local GA LOST forum section and become acquainted with the folks here.
We have a short trip planned for the 22nd-23rd (Mon-Tue) of the month down on the Flint River near Albany:
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=43424
While I have not been down there, maybe some of the other folks could comment on the viability of a 4x2 doing the trails.
Also, I would suggest the Sticky link that lists the U.S. Forest Service (FS) Roads, as a good place to start to get your feet wet:
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=43967
And, of course, if you have any other questions, please feel free to post them here or PM myself or nay of the other members.