I just emailed my best friend from high school. Her family vacationed at One Seagrove Place in the 60s. Hopefully she will remember because she's very smart -- she got a 1590 out of 1600 on her SATs.
I don't remember anything about South Walton from the 60s except that Daddy wanted to buy a boatload of beachfront acreage there, and Mom and I told him he was crazy. OOPS!