One is Sand Key. I still don't know if we are "allowed" in there, but I rode there alot there last winter without issue. BTW, on some days, there were up to ten of us in there.
Just avoid the surfers, there are TONS in there sometimes.

When within 100 yards of the jetty, holding ground and screaming upwind was a piece of cake. Once you got a distance from the jetty.... C YA....
you may as well do a downwinder. The trolley will drop you off in front of the park, then you have to walk about a half mile to the parking lot.