My wireless system I made portable. This picture shows the monitoring screen with the accessory plug added to the powercord so it can easily be carried to other vehicles.
Here is the back of the camera itself showing how I mounted the camera with some pipe strapping to a camera swivel mount that I then mounted to a magnet out of a old CD antenna. The magnet will be replaced by a suctioncup mount, one day.
This last view is of the business end of the camera.
I did get a good deal on this camera but they are less than a hundred at WallyWerld and probably cheaper from eBay.
The strength of the wireless is pretty powerful. I hooked the camera in the car, running off of the car battery, about 80 feet from the house and mounted the viewing screen in the house, operating off of a 12V powersupply. I could see clear enough to monitor the drive for company coming. I have not tried it on the back of the camper to see how the metal may effect the dignal.
I have used this camera on neighbors van hooking up his boat and BIL motorhome hooking a utility trailer and I Mentioned connecting it in the car to watch the driveway. I do like the handy anywhere use of it.
jim