A lot also depends upon the weight of the unit. The heavier the unit....the better it handles a cross wind. While we don’t go out looking for high winds... . we don’t panic in 30 to 40 mph. But, our unit is pushing 20K. In a light rig... I might not feel comfortable in a 20 mph cross-wind. Go slow, keep her pointed into the wind. If your “not” comfortable... park it into the wind and...”ride it out”!
We see a lot of semi roll-overs in our area....almost always an empty or lightly loaded van!