Nearshore or offshore

Headed to charleston for the 4th and if the weathers good. We are thinking about heading out for some kings. I normally fish out of oak island or southport so I don’t know much about the charleston area. Iam looking for a starting point. Is there anything happening from the beach to about 12 miles or do I need to look further offshore. Has anyone been catching any kings or cobia or should I look for spadefish and bottom fish. Thanks guys