Florida is rather notorious for strict enforcement of dinghy registration--even for those with foreign registered mother ships. Part of the problem in Florida is that every law enforcement entity--town, county, state police, FWC, DEP, etc. etc.--wants to get out on the water
, so they all get large boats and they have to show something for all that expense. One time I was waiting for a bridge opening in southern Florida and five different law enforcement agencies were represented amongst the circling boats, all looking for some minor infraction. However, as long as you have all your ducks in a row in terms of legality you won't have any major problems.