Bill always recommends bringing your checkbook.
Which is NOT that bad of an idea! Many unsuspecting folks write a check while they're here and never regret it!
That said, there'll be plenty going on that requires only a credit card! Like: restaurants everywhere, from cheap to expensive; special concerts and shows, whether at Savannah Center or Church on the Square; access to almost any sport you can imagine, regardless of how 'expensive' it might be.
Whatever, come and have the best time in our Friendliest Hometown!
SWR