Lenght of RV and trailer

I would agree it most cases you're probably not going to get pulled over for being over-length, however should you be involved in an injury or property damage accident, your fault or not, all bets are off.

Accident investigators will surely take measurements which will be scrutinized by the legal representatives of others involved in the accident. Guess who is going to be thought to have the deepest pockets?

Remember ignorance of applicable laws in whatever state your traveling in is no excuse for non compliance.