Need suspension modification advice for new class A

I've been told adding a bigger rear stabilizer bar will improve the handling of my class A (2013 Newmar Bay Star 33' gas, Ford F53 chassis). My main issue is how much it leans going in or out of sloped driveways, or around curves and corners on the road.

Since the cost of these additional rear stabilizer bars is significant I'd like to hear from others who have done this on their motorhome.

Thanks, Ken