I know this topic has been covered many times. I purchased a 2016 Fleetwood bounder 35K this year with a 22,000lbs F53 suspension. These are very tall rigs and very top heavy. I performed the cheap...
You can install after market four corner air bags, with a dash control to inflate them. If the body roll from winds or trucks passing is bothering you, all you have to do is inflate them to stiffen up the suspension. When the winds subside and you are on back roads, you deflate the air bags and you have the same smooth ride as before.