Ok, Many motor homes suffer from 3 things you can correct after market
Sway.. Side to side rocking.. Like Fans at a rock concert holding up their BICS
Workhorse put on heavy duty sway bars because they knew it was going to be a Motor home but not all companies do. So you may need to upgrade the sway bar.
Wag.. LEAF SPRING suspension allows the axle to move up and down relative to teh body (So does coil spring) but it also allows side to side movement of the body over the axle.. If the front moves right, and the rear left. You THINK you are drifting right and compensate. Only now you really ARE drifting left as the ends "Swap" (Wag the other way) and now you compensate again... Well this is now a full circle and it's very tiring.
TRAC BARS also called PanHard bars.. Stop this DEAD.
With either coil spring or Strut suspension Trac Bars or equivlent (independent front axles) are STANDARD and this is why pick ups went that route in the 60s.
Adding a trac bar makes a big improvement.
Finally you can add a steering stablizer.. THe two I suggest you look at are the Blue Ox Tru-Center and the Safe-T-Steer with optional remote re-center device.
The final adjutment is made FROM the driver's seat. and if you are under unusual conditions like a strong steady cross wind you can RE-Center to compensate.
These devices help you to stay on the straight and narrow. and when your ride is 6" Wider than the maximum for nearly everyone else. THE LANE IS NARROW