I did some research and found some
"new rules" posted in 2007 that state
Personal property, such as tents, shelters, chairs, catamarans, trailers, towels, shoes and other such items left overnight on the beach are declared a public nuisance and are considered trash. Items cannot be stored in the conservation zones, either.
so, I guess that settles that...but I may put in a phone call to double check, or, errr....have a problem with the boat that needs to stay overnight for the repair to cure