F-One, I'm here for you! Lifelong resident of Charleston, born in the sight of water, as they say.
Charleston is a huge eating town, and our restaurants are pretty much awesome! Tell me more about what you like to eat, setting: beach, downtown, ambiance, upscale, funky, etc. I can give better guidance like that.
The really cool charter is the Schooner Pride. I've taken folks out on it that are visiting and they really enjoy it. It is a big boat, so the wind has to be up pretty good to cut off the "iron jenny" but the sunset is beautiful. We are sailors (lived aboard briefly, but sold the boat a couple of years ago).
When are you coming? If y'all aren't axe murderers or anything, I might can take you out in the Cobia that is our "office boat". It is a nice 21' powerboat that we can scoot around the harbor and see the sights. My husband is a great captain so the boss doesn't mind that we use it!
Are you staying downtown? Will you have a car? That might also influence dining options...
Oh, and Rich in Tampa can maybe vouch that we are not axe murderers ourselves.
Sarah