Thanks all!
So it looks like:
Mrytle Beach, SC 7 hours 20 minutes
Charleston, SC 8 hours 20 minutes
Hilton Head, SC 9 hours
Edisto Island, SC 9 hours
Any other suggestions? Perhaps non-beach suggestions since the water will be WAY to cold. Of course we love to just look at the ocean, play in the sand, and then swim in a heated poolIt can be tricky to find a place w a heated pool though.
We go several times a year to MB it is very commercial but alot to do. One of the trips we take is always in March for a huge car show my husband loves. My DS is now 11 and we look for a hotel with indoor pool. We are trying a new place called the Dunes Village Resort with several indoor pool and slides for different ages.