We have towed our Airstreams somewhere around 120,000 miles in I don't know how many states with never any question about our width, weight, brakes, etc.
On the other hand, if you are inclined to worry about this sort of thing, be aware that by this fellow's estimation, the average person unknowingly commits three felonies a day:
https://www.amazon.com/Three-Felonie...felonies+a+day
Or, as Confucius said, "A man who wants to beat his dog can always find a stick to do it with."