You didn't mention what you are towing, but I have an A frame with minivan TV. I use Swift Hitch which I put on/take off when ever needed. It has full color or b/w. I set the camera on center console ( 2x2 inch pic), camera has magnet I place on back of TV or camper which I direct at the hitch or other depending on my needs. Easily recharged. It has saved me the multiple trips from the drivers seat to the camper hitch for hookups as the dogs are no help ! I got it several years ago from Amazon.
Dobe Fanatic - Largo, Florida
2012 Flagstaff T12RB A-Frame