Question for the guy's with duallies and big campers

I've got a 4,000 pound 11' camper. I hauled it on a SRW 3500 for a couple years and switched to a dually. I only had to drive out of my garage, down the driveway, and onto the street to notice a huge reduction in sway and roll.
I tow a 4,500 pound boat behind the rig, total weight about 17,000 pounds. It drives really nice but you do notice the camper on there in the corners. It's not bad. My wife's driven it a couple times and said it wasn't bad, a lot better than she expected.