We've tried a number of times to get into the state parks (Long Key, Bahia Honda and Pennekamp) but we've never been able to get a reservation.
That's why we're trying to find a decent private campground. Most seem to be really large/crowded. We're hoping to find something a little smaller/low key. Boyds seems awfully large and cramped, from what I can determine on-line. Grassy Key and El Mar seem to be a little smaller & more subdued? ?