316 is a two in, two out highway that runs right into Athens. Leaving, UGA has their stuff together, they open up both sides of 316 for cars leaving Athens. Coming in, not so much. It's not the worst, but people around here get excited whenever LSU comes to town, so it should be worse than usual.
Just get to campus really early and avoid a lot of traffic getting to Athens. Traffic will be horrible only within a few hours of game time. With LSU fans, I doubt that's a difficult suggestion to fulfill.