I'm still relatively new to the Class A scene. After about 4,000 miles on the road, I'm starting to wonder if the crazy loud wind noise around the windshield is normal. It is really loud on both sides...
Well, I did the testing with the tape and the noise is clearly being produced by wind passing by the side of the windshield and the frame. Taping up that seam helped immensely. The sad thing is it seems to be a terrible design flaw. I'll need to check with Winnebago and some windshield installers to see if there is a more permanent fix because I don't really want to drive around with masking tape on my windshield forever. Thanks all for the recommendations!