The Skyway Bridge
I-275 crosses Tampa Bay from Pinellas County to Manatee County and boasts the Worlds Largest Fishing Pier
Resident Owned Park really does mean just that.  At some point in years past a large enough % of the home owners in the Park got together and bought the land the Park sits on.  This form of real property ownership is usually called a cooperative or co-op.  No one has a deed to the ground their home sits on - instead each share holder, those who invest in the cooperative, have an equal share in the entire Park.  The co-op is usually a not for profit Corporation, it exists to benefit the members of the co-op.
There is a board of Directors
and share holders are all members.
 
Home owners that do not elect to buy a share are tenants of the co-op, pay monthly rent, enjoy the same amenities but do not own real property. (FS 723) 

Once a share has been acquired it stays with the home.
If a home owner without a share desires to buy into the co-op they certainly are encouraged but not required. 

Owning & occupying real property in Florida may allow you a "Homestead Exemption" of  $25,000. or $50,000. - reducing your property taxes by the amount of your exemption and also caps by % how much your taxes can be increased. 
For additional information please see
http://www.taxcollector.com/