One of the best pieces of advice we ever got with our 28' Class C, was to load it up like we were going on a trip; and then get the wheels aligned. The original chassis is aligned with no weight on it. A loaded RV is thousands of pounds heavier, and it affects the suspension/steering.
After the alignment, our Class C endured many high-wind situations with a lowered level of vigilance on our part. I'm not saying it tracked like an arrow; but in 35 mph crosswinds in Wyoming, we didn't feel like we shouldn't be on the road.