In her defense, it was raining just a bit, and visibility down the length of a 30+ foot trailer is limited, even though we have the Smith uprights with lights at the back. To make a long story short, she backed it into a tree, and broke one of the little bitty plug in market lights on the back of the trailer.
Truth be told, she maneuvers that trailer like a pro most of the time. She backs me in, I unhook the bow, she give me a little 'run and bump' and we're off the ramp in like 12 seconds.
Anyway, she felt really bad about 'trashing the trailer' so I said, what if I could give you a backup camera. BOOM! The only Member of the Admiral's "Funds Appropriation Committee" voted, and the quest was on...
So I found a cheap LCD screen, and submersible camera from one of those Japanese sites to use as a prototype. Turns out the prototype was good enough quality to move to production. Little bitty camera (about 1" x 1" x 1" without bracket)with LED lights for night vision, and a decent 4.5" screen for the dash that plugs into the cigarette lighter.
Mounted the camera on the bottom of the rear cross member of the trailer, ran RG6 Quad coax up to the tongue through the frame, and then ran another piece of the same from the dash to the hitch. Then I mounted a couple of Coax screw terminators (one to the hitch, and one to the trailer), I have a replaceable one that ties the two together, and since it will do all the moving, can be replaced if it breaks.
then there was the issue of how the hell am I going to get power back there... Then it hit me. a 5 pole trailer plug has a lead tied into the backup light circuit. New 7pin round to 5 pin flat adapter, ran wire down through the frame, to the camera, and voila. Put it in reverse, and you can see just what the prop sees.
Whole thing was a little over $100.
If anyone is interested in Pics, I'll post them, but I thought it was a pretty slick installation to solve the problem of seeing behind a wall of aluminum or just a long ways behind you.