The once and only time we were ever stopped anywhere for double towing (truck/5th wheel/16' boat) was on US-1 (Overseas Highway) in the Keys near Long Key back when it was perfectly legal to do so (1994). By a Dade County Sheriff who had traffic blocked with his vehicle and admitted he didn't know what the legal combo length allowed was in Florida. He said he'd stopped us because we looked awfully long. Got his wheel out of his trunk and ran it 3 times and then asked if I knew how long we were. I said yes and that we are 2" short of the max allowed in Florida. After a couple minutes, he said "be careful and enjoy your stay here" and got in his vehicle and made a "U" turn right on the bridge and left. This allowed the long backed up traffic to flow again. What a jerk!
Never been stopped since after and double towed many times since it was supposed to be illegal to double tow in Florida or in any other state either. We see RV rigs double towing when in Florida in winter several times a day and never seen one pulled over by an officer.
