tatest - not sure when you lived here, but the shopping is much improved. It has been many years since the Sears Catalog store was the main shopping option.
In addition to what others mentioned - day trips to Wilmington and Charleston. A day trip to Georgetown is a good option - especially during their annual river festival. Hampton Plantation is near by.
My family is from Whiteville, not real sure what there is to see there or in Lumberton. Calabash is interesting to watch the fishing boats come in and get some real Calabash style seafood, not the stuff the have along restaurant row. Ella's and Coleman's are two of the original restaurants.
In addition we now have quite a few bike trails and in Huntington Beach state park there are some walking trails and observation points.
Parasailing and deep sea fishing are other options. You can rent surf boards to try out our small but adequate waves.
One other stop not mentioned is Market Commons, next to the airport. While there stop in Toffinos for real Italian pastries. There was a compny doing Segway tours, not sure if they are still there.
Dolly's new production - Pirates of the Caribbean opened last year and should be something different for those who saw her previous show. If you are a golfer and don't want to do a full 18 - we have several executive par 3's. Nascar park is a lot of fun with their go carts of all sizes. Across the water way check out Myrtle Beach speedway - they sometimes have the opportunity to ride or drive a Nascar race car. View the whole thing from the air with a helicopter tour. If you have children Ripleys in all of its incarnations is fun and we have a new addition - Wonderworks.
Have fun and enjoy the rest of your visit.