I'm in Deer Lake State Park regularly and the most activity I've ever witnessed were two lovers in Speedo's holding hands. Generally, there's not a person to be seen in the park. I don't get the need to keep the place open - it'll look exactly the way it always looks ... vacant.
And I supposed you would also say that just because I see no people on the beach in the winter that we should close the beach. What about the State Forest. The most people I've ever seen while walking or riding on the trails in the State Forest is zero. Does that mean we should close the State Forest to the visitors who use it?
The County Seal for Walton County has three words on it. I bet you don't have a clue as to what they are. I'm not sure who was responsible for creating them, but those three words have enough meaning that they were integrated into the Seal. Go look them up.