When you're in McCormick, South Carolina, there are a few convenient options for dumping your black water and gray water tanks.Head to Mistletoe State Park or Greenwood State Park for dump stations equipped with fresh water and a hose for flushing tanks.If you're traveling from Georgia, the Georgia Welcome Center near McCormick also offers RV waste disposal facilities.Additionally, the Callaway Plantation Museum provides an RV trash bin for easy disposal while visiting this historic site.