I live in Charleston, I've gone down there once a year. Personally, save your money and do NOT go to the PGA course. Go to the Olde South course nearby for 45$ish on an afternoon WITH a cart. If you want to the spend the money, do the RTJ course. I loved it, but if you want to go spend your money, you'll enjoy the Harbour Town course- not sure the kind of wait you'll have. Enjoy!
Personally, Sea Island and St. Simon's Georgia has better golf.