Looks like the problem is one of connection the rack to the rails. I looked at The Rhino systems when I bought my 2020 Touring and found that the Rhino did not offer the system I wanted. No viable way to secure it to the roof rails that I could find for the Rhino.
If you are interested I went with the Surco Safari 5.0 system instead. Does not require cross bars, just rails. Their system uses sliding rail clamps that allow you to get a perfect fit and move the basket forward and back as you like.
The part number to fit our Passports is S4550. It goes on and comes off easily once you have it set up.
Sounds normal to me. I’m rolling on A/T tires and have also ditch lights so can’t tell you the precise “noise” location/value. Matter of taste and probably everything depends on the expectations. I’d compare it to the noise lvl when having for instance skis or bicycle on the roof. Although, this is just my perspective. 
