I have a 2011 Fleetwood Storm 32BH that I bought new about 3 years ago. I hated the ride at first, but after a few adjustments and additions, I'm very pleased with the handling, and the ride has improved as well (although still a little rough on the poorly maintained roads). Here are the things I did to mine:
Added around 10-15 PSI to all the tires above what the dealer had in there, to about 5 PSI above the tire manufacturer's specs given my RV's weight on each axle. This helped somewhat, and it was basically free.
Did the CFH ("cheap handling fix") moving the bolts to the other hole on both the front and rear sway bars. This really helped the ride. Less rocking and less susceptible to the wind from passing trucks, etc., and it was free and pretty easy to do with minimal tools.
Added a rear track bar. This cost me about $500, and I installed it myself with a bit more effort than the CFH. Rear track bars are meant to reduce the wagging rear end that gives you the sensation that you're swerving, causing the driver to overcorrect with the steering wheel. I only noticed a marginal difference over the improvements the CFH already provided.
Added a SteerSafe. It's basically a set of springs that connect the front axle to the front wheels to help hold it in a near-straight position. I got them at a Fleetwood RV rally for $375, installed by the company. To me, this improved the driving experience more than the track bar because I'm finding I don't need to fight with the steering wheel with every passing car or gust of wind. I found that I didn't get tired of driving as quickly after installing this. It's also supposed to help keep the wheels straight in the event of a blowout, but I don't plan to test that feature.