First: Alignment and proper tire inflation (Rarly anything you think it is ) is step one. to properly inflate tires you have two choices.. The easy (but slightly more expensive way) is to go to RV Safety & Education Foundation
and click on the weight link, they come to you with portable scales, find a place and weight it, they do an interview (By phone) and bring the needed charts and stuff with them.
The harder (But slightly cheaper way) is to do a 4-corner weight, this requires you find a FLAT SCALE, Segmented if possible, Park with front and rear axle on different segments and get total axle weight
No park so only one side is on the scale, still segmented, and get the That side weight,, Axle - Side = other side, then to to the tire maker's web site and download the inflation chart, Inflate all tires according to the weight results.
Next: Motor homes are nortorious for 3 suspension issues (Well 2 are issues for sure, one you decide)
1: Sway, Think of fans at a Feet The World concert swaying side to side while holding their BIC's... The motor home Rocks side to side (Tilts left, tilts right, tilts left and so on)
SWAY bars are an attempt to control this, SOME coaches have good ones, some.. do not and can benefit from an improvement.
WAG,, Think of a dog wagging it's tail side to side,, In this case the motor home is moving sideways over the axles. The front moves left as the rear moves right making you THINK you are going to the left.. then they swap and you THINK you are not going right, you compensate, which by the way makes it worse.
TRAC BARS also known as Pan Hard bars stop this dead, I mean DEAD if you put two of them on, one may do it
This is caused because leaf springs are able to move a bit side to side, If you have independent front suspension, then you do not need a front track bar.. Likewise strut suspension already has them. But Leaf Springs,, NEED THEM.
Finally there is a steering stabilizer.. This is the one where you decide.. This is a device that attempts to keep you pointed straight ahead.. Mine is a Blue Ox True Center..