Several things affect motor home handling.. One of the most important is tire pressure, IT MUST be the proper pressure for the load the tire is holding up.. This is almost never the number molded on the side wall nor is it often the number on the sticker inside the motor home.. The only way to find it is to get your 4 corner weights and look it up..
has a service that will do the "grunt work" for you. they bring scales to you by the way.. And look up the tire chart, and check your tire gauge and so on The price, though higher than a scale house, is reasonable.
Next are 3 handling improvements
I will start with Sway Bars... RV's tend to be a touch top heavy, they like to rock side to side (Think of the fans at a "Save the world" Concert swaying side to to side in step with the music) Sway bars are a standard part of every chassis, but many are a bit anemic, thus companies make stronger after market add-ons.
Trac Bar.. RVs usually have spring suspension and solid front axles.. With Leaf Spring suspension the body can move a bit side to side over the axle. When (not if) this happens as your are driving it causes the RV to, well, Wag, like a dog's tail wagging side to side.
Track Bars positively LOCK the body centered over the axle. They do not allow movement.
Independent front suspension.. Does not need a FRONT track bar
Strut suspension includes trac bars so do not need them
Neither is common on motor homes.
Finally a steering stablizer.. This is a device that basically helps to hold the wheel in the "Straight Ahead" position.
I put a Trac Bar (just one) and a Blue Ox Tru-Center on this RV in 2006
Jan 2 2006 I left for Las Vegas pulling a 1992 Chevy Lumina, When I got to LV it was nice driving that Lumina,, I mean the RV was.. Not a fund drive.
Returning home to Detroit I added the track bar (Davis) and True-Center.
Left again for Vegas just prior to Thanksgiving.. When I got there, that Lumina (Same Lumina) was very hard to drive.. I mean the handling was nasty compared to the motor home.
Same motor home
Same driver (ME)
Just added the Trac Bar and stabilizer.