I have had 2 hardside campers over the years. Both 11 foot caribou's. 92 and 96.
Both big and heavy.
The first was on a 94 F350 Dually. I did notice significant sway while cornering or more so turning out of a parking lot.
My current rig is a F550 with a pick up bed. Found the rig that is right for me.
Stock and handles the camper like it isn't there in stock form.
There have been a couple comments about set up so I will share a story from last summer.
Went to the Rim country with a group of friends with their toy haulers. I got ther a bit late so had lots of unneeded help to set up. I pulled in put the truck in Park and when the group asked what they could do to help set up My response was I put it in park, I'm set up. Now ask why I have a hard side TC :{)