I want you to take the 5th wheel and drive 60 mph and have a friend follow you by the side in his auto. Have him get ahead of you and be able to observe the front roof top cap and see if he sees the rubber billowing up in the front. IF this front area behind the front cap are the only bubbles, odds are air is getting under that front cap seam. When this happens the front seam appears to be tight with no gaps. But at 60 mph, the air does get under and cause this type problem. I did not realize until I read your post again that the bubbles appear only in the front few feet. I thought you had this all over the complete roof, which is why I stated cleaning products. Doug