Fort Pulaski is interesting
https://www.nps.gov/fopu/index.htmWormsloe was interesting
https://gastateparks.org/WormsloeI have an aunt and uncle there , they took us to some outside crab shack on the water , I love see food
water front was nice. there is a shuttle to the convention center they run , it was a free thing to do with kids go see a bit of the river look around at the other side for a while then catch a boat back.
it was nice weather one of the days it was late October early November so we took the kids to the beach I think that was Tybee island, I think people thought we were nuts but it was like 77 degrees and the water was still warmer than it gets here mid summer.