WD,

There are several nice beaches.  Myrtle Beach...has become a big tourist trap but has all sorts of shows and activities.  Several nice beaches close to Myrtle.  Charleston is here.  Not much beach accessible in Charleston but lots of beach very close by.

Most of what's between Myrtle and Charleston is small beach towns.  Golf courses everywhere if you play...especially around Myrtle.  I keep meaning to go that way one weekend and just ride down the coast and see what I can find. But, life keeps intervening and I never seem to have the time.

There is a state income tax here.  I know you don't have that in TN.