Hi, K.,
We lived on Wilmington Island (just outside of Savannah) when I was a little girl. There are some neat things to see and do in the area--historic homes, civil war battle sites, great food, beautiful settings. There are all kinds of tours you can do, from walking to trolley. Two websites that might have things to help you plan in advance are: http://www.savannah-visit.com/ (there is a special offers section on that one) or http://www.savannah.com/index.cfm (you can order a visitor's guide from there or view it online). One of the places that sticks out in my memories is The Pirates' Den (I could be wrong on that name, but it was something to that affect--I'm guessing it's probably still in business, but you never know!)...it was a restaurant that had themed rooms--including one where it was "raining" and another that had a "secret tunnel" with a pirate standing guard. It was by the waterfront somewhere.
If you head further south, you can visit St.Simons Island--my aunt and uncle still live there, and it's just lovely. There's a fun pier, mini golf, and ice cream/shops on one part of the island. There's great beaches there, too. The drive down is pretty with the moss on the trees over the roads and such.
There are also other places not too far of a drive as well...Hilton Head, Tybee Island, South Carolina, etc. We used to swim on Tybee Island when I was a kid--the dolphins would play around us, and my parents were always comforted that they were nearby to protect us. That's been many years, so I have no idea what it's like now, but it was nice then.
Have a fun trip :)
Blessings,
V.