While reading some of the posts, I became aware of some misconceptions regarding riding in the Okeechobee prairie, aka Viking Estates in the NW portion of Okeechobee County.  NONE of the land is "public" land.  All the lots are owned by individuals.  In fact, unlike most towns and neighborhoods, each property line extends to the middle of the "Streets", which are not streets at all in that the county does not maintain them.  Each property owner extends to the Coquina Water District "right of way" access to the roads to maintain the canals.  It is the Coquina Water District that maintains the roads just enough to allow them access to the canals.  So, in fact, where ever you ride or park trailers out there you are tresspassing on private property, which is why the Sheriff's department can prevent riding and seize ATVs.  Landowners can legally block off access to the streets whenever they wish, granting "right of way" access to those that require it.
Whle previous posts are correct in that most ATV riders are respectful, there are a few that ruin it for all.  Trash, deliberately doing "donuts" in the streets, thefts, riding near houses late at night and constantly riding up and down the same street in front of a house looking for an "audience" has caused property owners to encourage the Sheriff's department to stop all non property owners from riding there.