I finally visited the park.
Found out they do allow couples for up to a month but not for a whole winter though their workampers can be couples. About 2/3's of the sites are owned by singles. The other 1/3 is rented day/week/month/annual. A buyer has to be living the single lifestyle to buy a lot or place. Tons of ancient oaks with Spanish moss, lots vary widely in size and accommodations. Everything there from park models, trailers, 5th wheels, B's, C's, A's. A few mobile homes too though I think they call those manufactured homes now. Nothing over 36 feet allowed, could be the whimsical curvy one laned roads just don't allow for mega rigs. No two lots alike, except some of the rental sites are very similar. The owner lots looked bigger than most of the rental sites.
It's very true that not all singles are looking to be a couple. A lot of head strong singles just want to do as they please without having to fight it out with a spouse first. LOL!
Some over 55 singles have already been a couple and now they are divorced or widowed, and just aren't looking to find a new mate.
I thought the concept was odd at first, but now I see it can have great advantages for just having friends without being lost in a sea of couples. I found out many of their long term residents still travel often, some have two RV's, one to live in, one to travel in. Many places were closed up for the summer, with their owners gone. Other folks are living there year round or living there when they aren't on the road traveling.