Thank you all so much. I was thinking it was the top window as well and had planned on putting some sealant around it when we got home. My DH had planned on taking the window out and now he will for sure. We are at Mt. Rushmore now and should be home in a couple of days.
Going through the parking lot toll window at the park I knocked the passenger side mirror. It is still attached but not sure it will make 850 miles. They had buses and RV's going through the auto slots, don't know why.
We hit a lot of high winds in South Dakota, probably over 40mph gusts so it was a slow drive. The front window and side windows whistled. When I unlocked the side windows the whistling stopped on the side windows, thank goodness.
Bonnie