We had a factory installed unit from Voyager in our 15 Lance, worked great. But when I tried to replace the camera to install on our new Lance (lost our other one in a shop fire) I couldn't get one obsolete already, right! Could have bought a re-conditioned one for about 4-500 as I recall.I wasn't about to give them anymore of my money (plus they never ever replied to my emails) so I figured the heck with them!
So I did some checking & ended up having a Furrion (spelling ??) system installed for about 400 complete.
They pulled the power off the rear top clearance light for the camera, ( which only works with the lights on, no big deal for us as I drive with lights on especially if I'm towing & need the camera. Besides this serves at on-off switch as our replacement Lance wasn't wired for a camera from the factory.
The tech hid the wire from the light by going drilling behind the light & fishing the wire back out behind the camera, looks totally factory a very nice install!
Anyway this worked for my situation, good luck