re: Columbia, SC - UGA vs USC... what to do?

I live here and those cautioning you about the area are correct. As for the game, you might consider parking at Colonial Life Arena and taking the shuttle bus to the stadium. Parking there is free and the round trip bus ride is about 5 bucks. Bus drops off and picks up at the entry to the fair grounds. It's a bit of a walk to the stadium but you'll avoid all the game traffic and parking madness. As for stuff to do here, let me just say this, Chick fil-A is considered fine dining.