Not only do you need to be careful on highways, but in some unexpected places as well. For example, DO NOT ever try to pick up anybody at the arrival area of Denver International Airport. You will lose your roof! We planned to pick up our daughters in Denver on the way home on a cross country trip. We arranged to stay at the Denver East KOA and had the good fortune to call ahead and ask the CG host if we would encounter any problems picking up at the airport. She told us that we needed to pick up our daughters at the Departure Area, not the Arrival Area for the reason noted above. She said more than a few RVs lost their roofs going to the arrival area. Since then, whenever we need to pick up anyone at an airport, we contact folks in the airport area ahead of time to make sure we will be OK.
Bob