Towing with RV questions

In most (if not all) states, the RV and trailer limit is anywhere from 65 to 70 feet in combined vehicle length.

In a state where the max length is 65 feet, a 40' Class A with a 24' tag (24' box with a 4' tongue) is going to be too long by 3 feet. In turn, a 33' toter home with a 40' stacker is going to be 8 feet too long.

So what happens when you get pulled over and the officer measures the combined vehicle length? A fine? Or is a CDL required? And if a CDL is required to drive an RV/trailer combination that exceeds the length limits, do you have to "act" like a CDL driven truck and stop at weight stations and keep a driver's log?

Thanks in advance.