We're going to be in Savannah's historic district this weekend for only 2 days, and are planning on making a trip out to Tybee Island as well. First time there...hoping to feast on fresh fish and seafood the whole weekend. Looking for the best local experience--not too expensive. Heard about the Crab Shack on Tybee Island--wondering if it's worth it. Also, would love to eat on the Riverfront if anyone knows of anything there. Any suggestions would be greatly appreciated!