The only bad sound we've had while driving in strong winds is the slide out awning being pulled out a little bit then going back in. When we stopped we could not find a thing but finally we did decide it was coming from the large slide awning. We slowed down and it got better. Awning locks will help. Sometimes the main outdoor awning will flop around a little. Check to be sure all awnings are locked down then see if the noise stops. With slide awning though...be sure they are unlocked before trying to put them out.
Some slide awnings have a lever that can be pushed back to lock them, could be some don't but I have heard there are add-on locks that can be attached. We have a "cradle" the main shade awnings sits in and we wrap velcro straps around the large awning arms to ensure it stays secure.
good luck