There are 3 ...well 4, improvements you can make on many motor homes
That is one of 'em,, NOTE: Safe-t-steer has an optional remote adjustment thingy, I highly recommend it (You can re-set center from the driver's seat no hammer or wrench needed, this was not offered when I got my Blue-ox, but Blue-ox has it that's why I have one).
These try to hold you on the straight and narrow, Do not think they will fix your problem though.
Sway bars.. If you have someone follow you and they report the motor home rocking right and left, like fans at a Rock Concert singing WE are The World while holding up their lit Bics... Well..... Sway bars attempt to control this.. OFTEN the factory bars are just not up to a motor home
Now the other one is wag.. Motor homes use leaf spring suspension, this allows for some side to side movement of the body over the axles. Your follow car may see it wagging like a dog's tail.
TRAC Bars (also called pan-hard bars) stop this 100%, Completly eliminate it
I put on a front trac bar,, Most folks tell me the rear one is more important
MADE A BIG DIFFERENCE in my driving experience.
Unlike your stabilizer, Trac Bars have only two moving parts, the bearings on the ends of the rod, nothing else. it is, effectively, one solid bar (may be one bar or a 2 piece, adjustable bar, but once installed, it's one solid bar).
I think this will do more for you than the Safe-t-steer, but by no means neglect the stabilizer as well.
the 4th thing: How are your Shocks?