I can say that more than a few of the trucks I have seen that have experienced noise are sitting at “level” or are squatting in the rear (mostly squatting or are just lower on the rear end). That will definitely have a lot to do with how the wind reacts and sounds. Standard truck bed rake typically has a higher rear end (to achieve level or close to level once loaded). With the addition of the camper, gear, build outs, etc I see most customers sagging in the rear end (which is not good for the truck overall anyway). Of course this does not account for everything but it is definitely something to check. Even if you do not have wind noise a sagging rear one will cause the camper to sit inside of the airstream instead of below it which can affect other things like MPGs. I think this is a good Segway into how to properly set up a truck for the extra weight we all add with these modifications. Not saying this is what you all are dealing with, just putting that info out there for others who may be!