We have a camera in the back of our Odyssey and also have one in the back of our Scamp
The Odyssey's camera is located in the center of the Odyssey's rear door. It makes it easy for me to singlehandedly connect the Odyssey to the trailer.
We've had a camera in the rear window of the trailer for a number of years. It displays in the Odyssey on a separate monitor to the left of the driver's console. (Monitors can be located in a number of places including the location of the rear view monitor.) It totally eliminates the dead sot behind the trailer.
We use the Scamp's camper in place of extended side mirrors.
I do not use the camera to back up the trailer. Ginny still does the backup function but I'm sure if she wasn't there I could manage with the camera. I do use the backup camera in the Odyssey to back up and find it a great aid.
We still carry our extended mirrors as a back up and have not used them in years. We have never been stopped for not having extended mirrors.
We do have a second monitor and camera should something happen to the first. As well we have a wireless camera that can communicate with our cell phone and perform the same function. Actually the cell phone monitor is much sharper than the one we use.
The only improvement would be if the camera was fully integrated into the Honda's display.