A couple of friends of mine are police officers at our state fair park. At the daily close of the state fair and other events they sweep the park to make sure they got everyone out and there is nobody hiding or passed out somewhere. But of course they can’t check everywhere, and there are always vendors and other employees remaining so every now and then someone who shouldn’t still be there is found by the cops or security staff.
Sometimes those people that hide and stay are up to no good. Trying to break into vendor stands and such. Charges of prowling or even burglary happens.
In Florida’s climate, it probably wouldn’t be too hard to find someplace not too uncomfortable to sleep, even without proper camping gear. Though sleeping might make it harder to evade security (or the soul-eating demons).