Tripp, I know your dilemma.......
The State of Georgia has gorgeous State parks which I visit frequently. However, if one exists with ANY septic hook-ups, I am unaware of it. It is a hassle to move your coach/trailer back and forth to a dump station when your tanks are full. I have a friend who spends two/three weeks at a time in different parks. He bought a wheeled septic cart for just such purposes. He can drain about fifty gallons into the tank of the cart and wheel it over to the dump station. I believe they cost about $250, but I'm not sure exactly where one goes to acquire one. Perhaps someone else can answer your problem, and further address my response.