You may have read that I visited The Mountain of RV Handling Knowledge, Hendersons Line Up in Grants Pass OR, and had an audience with the Prophet of same, John Henderson. We talked mostly about alignment, but my recall is that he liked Front End Alignment With Caster and/or Safe-T-Plus Damper/Stabilizer AND a Rear Sway Bar.
From my personal experience, I'd install Hellwig sway bars Front and Rear. You have a late-model chassis, 2008 or newer, right? The OEM front bar is better executed than 1992-2007 but still undersized. The rear sway bar is the same from any E-Super Duty or E450 regardless of model year. So if you want to cut your cost a little, my take would be Rear, and use Hellwig, much less expensive than Roadmaster for the same thing. By all means, do the front too if you can.
You have Alignment. You're adding Sway Bar(s). This is all good. Have you also weighed the coach and adjusted Tire Pressures?
