My parents have stayed at El Valle Del Sol
in Mission the last 10 years (Nov - April). As far as monthly fee, they are lower than most. They have a large dance hall (Peppermint Palace Recreation Hall) and a Carpenter Shop & Rock Shop.
There are so many other campgrounds in the area, there are other events that they go to. So you might stay at one park, but visit dances, health fairs, bingo, luncheons at other parks....
Yes, they have said there are periods of wind, so bring awning straps.
Before diesel prices went up you had to reserve a site a few months ahead. But now, they said there always seems to be open spots. They always put a deposit down when they leave to get the same site for the next year.