I have a 31 ft Jayco Eagle TT and an 8' bed extended cab Chevy 2500 pickup. trailer is 35' OAL truck 21' Yes, its long but absolutely no problems towing. backing into campsites can be challenging - and many sites are too short to park both truck and trailer end to end. I have had to park the truck away from the campsite at some campgrounds.
However, I drove a firetruck for many years - a ladder truck for the last 10 - I always looked for an escape route prior to committing to an unknown side street or parking lot. I parked and walked alot!
I recently exited a freeway onto a blvd. marked "No Trucks" it was quickly evident why no trucks were allowed. This was a high class retail area with tree lined lanes- even the medians. All of the side streets were too narrow to turn onto without striking trees, curbs, signs -ARG! I pulled to the side and looked at google earth to plan my escape. I drove 2 miles to find a "block" that I could negotiate. All for love of Chik-Fil-A. I found out later that access for trucks was thru alleys from the next street down.