i had a 32' class A on that chassis and it did get pushed around in the wind. The best advice I was given was to relax while driving and don't grab on to the stearing wheel. I try and drive with my arms on the armrest and lightly hilding wheel with my hands. You will soon get the "feel" of when a truck is about to pass you as you feel the RV slightly move to the right.
If it really is an issue, look to upgrade to a larger coach. When I moved up to a 40' on a freightliner chassis, it handles a ton better in the wind. A tag handles even better!