Re: does any one tie the rear down when trailering?
bitterboater is correct. I was skeptical when I read the Fed law. So I called the highway patrol. The answer was that by state law also, unequivocally the boat must be fastened down. Now, around lake areas you will see multitudes of folks who have dry storage either at their home or other that is only a mile or two away and law enforcement looks the other way when they see one being towed without tie-downs.
Also, the law is one of those ( like not having a front license plate on your vehicle) that police often turn away from. But in the event that they want to check you out for something else, having no tie-downs gives them probable cause to stop you.
And finally, if your boat comes loose without tie-downs and causes another person or vehicle to be involved, you will be cited which paves the way for those involved to take you to civil court.
Aside from taking a big risk with your recreational investment, you risk losing your nest egg.