IMOP. No more people than will be in the big 4 MB CGS. I'd try one of them. You would not only have full hookups, but indoor pools as well, and be on the beach.
Myrtle Beach Travel Park on the North end, is very nice, and near restaurant, row, and Barefoot landing.
OL, PL, and LW are in the South end, and near shopping, and many other attractions.
All have ocean front, or just beach sites, and like I say, full hookup. Going to a dump station, is not something I want to do. But staying in those CGs will put you near so many things. Plus the rates are very low in the winter.