All of the coureses at Sea Island are great. They were all redesigned by the top guys just a few years ago. There is one course on Sea Island proper which is absolutely incredible. It is called Ocean Forest. It was a private club, but after the ownership change, the public may be able to play it. If you can get on, I would highly recommend that you guys play it.
I have been to Sea Island dozens if times. Please PM me if you have any questions about anything. It is one of my favorite places on earth.