I think "20 mph wind" is a misnomer. At 20 mph it's called a gentle breeze. ;) At over 50 mph you'll want to let some air out of the tires on the windward side so you can lean into it a little.:B (JK)
No problems at all up to 30 mph. If you're feeling anxious about the winds when you're driving, slow down. Cutting your speed makes a big difference. If you're still not comfortable, pull over and stop for awhile.
Winds were gusting to 40 here today. I drove 300 miles and hardly noticed it. (Truck sans camper.) Tomorrow they're to be 40 gusting to 50+. I'd sit that one out if I was towing.