A few years ago we stayed at and really liked Belle Parc in Brooksville. Not a 55+ but no kids when we were there. A little too cold for us, but a really nice park we thought.
I would like to suggest Civic Center these are really one of the best option concern with winter parks..They are not only affordable but convenient also.
If anyone is still interested this is a well maintained park with owners and management living on the park grounds. There is a new modern club house with numerous hobby rooms such as wood working and needle point.