Fastening backup camera to motorhome

Thanks for all the info. I'll remove a marker light and verify what's behind there. It sounds like I have options. I think mounting it directly to the back will look the best. It also helps with another issue. I bought the camera that Costco advertises and it has a connector on a few feet of cable that isn't water proof. That connecter attaches to a much longer cable that I would run to the front. If I take the cable through the wall it will wind up in a cabinet over the bed that would keep water away from it. If I try to keep the cable outside, I have to come up with a way to waterproof the connector. The trade off here is making screw holes and a cable penetration in the wall versus waterproofing a connector and being satisfied with a cable strapped to the outside of the MH. I thought about mounting the camera in the rear window but I have blinds that I would have to figure out how to reconfigure to make room for the camera. So I suspect I will either screw it to the back or make a bracket to attach it to the ladder.

Again, thanks for the help - Mike