I know this really isn't the answer that you seek but......research and find Bowen Island Restaurant while you are down there. It is essentially the very small spit of land that you cross over coming from Danie Island via the mainland.
The restaurant is located on the southern tip of that little island and they have the best food in all of Charleston area. It is very laid back and they stock some great cold beer.
As for the fishing.....I would take a decent set up and target the pompanos in the suds along the beach. They will be there and I would dig my own sand fleas as they should be plentiful. Pomps will give a good fight and can keep you busy. There is a multitude of post on here about pomp's so do a little homework and you will have some fun.
Give a man a fish and he will eat for a day. Teach him how to fish and he will sit on a beach and drink beer all day.