Sway bars

I would start with shocks, which you will need anyway. I can't imagine how bad her back is that sway is worse than bridge bumps or other bad roads...
The shocks on the stock truck are meant for much less mass than your TC set-up, Even new shocks will help but yo need an upgrade.
That 3500 is a workhorse. You will be fine.

c.traveler2 wrote:
Check out Hellwig products

I see nothing under Hellwig but Roadmaster lists a rear bar for a 2001 Dodge.

GeoBoy wrote:
10 or 12’ camper with 2 slides is going to be pretty heavy for a 2001 3500 dually.

Agreed. We have a 2001 3500 Dodge dually and it is overloaded with a 2500 lb (dry) Northern Lite 10-2 CD.

Check out Hellwig products

10 or 12’ camper with 2 slides is going to be pretty heavy for a 2001 3500 dually.

If you think the C has no sway, the TC will feel like a Porsche.

Larger sway bars will help sway. A few companies make them. Also, good shocks will help with the ride. If you are running the originals, replace those as well.

Sway and bounce in a truck toting a TC are largely a result of road conditions, speed and wind IMO.