I have a 45' pulling a 22' trailer travelled through many States where my overall length is illegal.
Maybe just lucky, but not been stopped or found any issues in truck stops or any where come to that
My plan "B" is the car on the trailer is capable of puling the trailer if required, with ease.
Have found camp sites including State Parks know where you can leave the trailer if not on the site with you.
Farmers are a valuable resource for a place to leave a trailer for a few bucks a week.
No problem to date.
I would recommend a well appointed aluminium trailer with tilt deck.