So just to temper expectations for putting on a 5th Wheel....Just got done mounting the camera's on my 42ft Northpoint.
The mounts don't stick out far enough to get over awnings so you will not be able to see close to your trailer as the line of sight will be blocked by the awning. I tried to fabricate a mount that pushed it a couple inches off the camper but it still was blocking.
I ended up mounting the camera's under the awning about 10.5ft up from the ground and the side with all the awnings (passenger side) can't quite see to the back because of the awning arms.
I tried mounting the front on the top of the camper right before the cap but all it saw was the cap. The front ended up needing to get bent a bit to get that 45 degree angle they want and that had to go in the fiberglass cap.
Between awnings, windows, front cap, slides, needing to be 1/2 way on the sides and other stuff there aren't a lot of options for mounting on a 5th wheel. However on a trailer with flat sides and flat nose I think it would be easy to install and work great.