I had a friend that bought a new 24 ft travel trailer in the 80's. They loaded it up and went to their favorite lake which included driving over 20 miles of rough roads. When they got to where they were going to camp they opened the door and found some of the cabinets and contents all over the floor. They closed the door and drove back home to their dealer. it was fixed under warranty but they upgraded to a better rig. It can happen.
The big thing with some class A coaches is you can pop a windshield from to much flexing going over rough roads and into rough campsites.