I've had a similar run in like yers. Got pulled over in Eagle by a State Trooper. Had a load of tin. About 2 feet above my cab. But i had 5 straps, 1 big army tarp, and 4 more straps on that. My load wasnt goin ANYWHERE lol. I was doing a ranch clean up, and had to pull a LOT of things out of the ground. So i had my big hitch on meant for pullin. He said it "Obstructed the view of my license plate". We both know that it was just an excuse to check out what i was doin with a huge load covered by an army tarp. But no worries. Cops will be cops!