I had a dodge ram 3500 dually diesel, pulling a very heavy 35' 5wheel.
One sure knew it was a truck it rode like a truck and handled like a truck. Even though I had a air bag/shock system king pin the chucking was still very bad at times.
Moved to low end gasser the ride was some much more enjoyable even DW was happy. Moved to older diesel pusher and the ride was better.
For us there were so many advantages to moving up to a class A over the 5th wheel set up. Ride was just one of many, over all convenience related to class A traveling. Dogs love it as does the cat!
good luck
Itasca Meridian SE 36g
Road Master Tow Dolly