Re: Advice on traveling to the game from Atlanta:
In a best case you clear Customs, get you bag and get in your rental car by 1430. It should take you 3 to 4 hours to get to CAE, depending on traffic in ATL when you are leaving (I recomend taking I-285 around the south side of ATL to I-20 to avoid the traffic that sometimes starts backing up downtown (I-75/85 to I-20) around 1500.
Best case you hit CAE right at 1800, then have that traffic to deal with.
After the game leave CAE and drive to Augusta, where you can get a better hotel, it only an hour away.