A number of Florida RV parks run what they call their 7 and 5 plan. You pay up front for 7 months and you can then leave your RV on your site, unoccupied for the 5 month off season. If you use it during the 5 month period, the you pay the regular daily/weekly/monthly rate.
Last fall, I believe it was, I got an advertisement/invitation from Fiesta Key RV Resort with such an offer. For a waterfront back in 50 amp site, the seven month charge was $15,700 plus change, paid in advance the 7 months had to be consecutive, stated on the contract in advance. Any stays during the 5 month period were extra, charged at the then current rate.
Like the old saying goes, whether you rent or buy, you pay for the space you occupie. I suspect many seasonal resort areas run similar programs as probably half their sites are going to be empty during the off season anyway. So it doesn't cost the campground anything to have your rig on a site during the off season.