Garmin RV 760 LMT with camera. I ran two power points under my rear bumper. One is for when I'm not hooked up to the trailer. This is wired to my back up lights. The other is wired to an Upfitter switch.
I also ran an extension cable under my trailer to the back bumper.
This way I can just use my quick release power connections and swap it out to the upfitter switch. I can flip the switch and see behind the trailer whenever I want to. Just turn the switch off and it goes back to GPS.
The camera is on a small clip that I move from the truck plate to the trailer bumper where I installed a mounting point.
Works great and takes only about 45 seconds to swap out camera and power connections.
The transmitter is ziptied under the rear bumper and I get great reception.