Originally Posted by akozman
65' is legal in all states for non-commercial, commericial is where it gets tricky depending on the state it ranges from something like 65-73ish
Hate to bust your bubble, but that is completely wrong. Length laws are for both commercial and non-commercial. Some states are way less than 65'. Will you get hassled? Maybe, maybe not. But, most states are getting WAY more picky about people with pick-ups pulling huge trailers. Many states also have length laws just for the trailer. For example, you are way over the 40' trailer length law in Indiana, plus their combined length limit is only 60'. You are going to want to read up on the rules of the road before you get some significant fines somewhere. I bet you didn't know that you are required to follow the truck speed limit in Michigan too, even as a non-commercial rig.
That is a decent link for laws for different states. Some of their information is incorrect as it is out of date. It still says the towing speed limit in MI is 55. It is 65 now, the same as the truck limit.