My family stays at the Sugarloaf KOA. We will be down there again in early April for Easter.
Not quiet by any means but plenty to do for kids and adults. Bar, 24 hour pool, right on the gulf, water trampoline, nightly entertainment, etc.
I just made reservations last week so they may still have open sites. Figure on $100+ a night for full hookups.
Do a IRV2 Search and you will see a bunch of threads on Key West and the Florida Keys.
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
RVing for 19 years & 150,000+ miles