All one has to do to answer your question is follow an RV with bicycles attached to the ladder ... it's just down right scary. Once upon a time I had one of those ladder mount bike racks ... no matter how well I lashed them down, it eventually started wearing a groove into the ladder tubes ... then I got a rear camera mounted on the rear cap ... Jumpin Jiminy Crickets, sold that mess on the local swap shop. I went with a bicycle rack mounted on my rear hitch.
