Hi
I have a Hybrid Travel Trailer so I have a backup camera on my pick-up truck so I can see to the hitch and I installed one near the roof, just below the marker lights.
The Travel Trailer camera is connected to the marker lights so it will be "on" when my lights are on.
I also mounted an LED light strip that I can turn on for backing in after dark.
I really like being able to see if I have cars behind me or if it is all clear. Good to know when pulling out into traffic as I can see if anything is coming from quite a ways.
I mounted a cheap licence plate camera. If it burns out, I'll get another or find something else.