You might just get one of the aftermarket wireless backup cameras for autos. I bought one for only $70 bucks at either SAMS or COSTCO a couple years ago and it works well. Tiny screen and 12 volts so it draws little current and takes up little space. Outside camera is very tiny.
hershey - albuquerque, nm
Someday Finally Got Here
My wife does all the driving - I just get to hold the steering wheel.
Face Book Group: All About RVing and We Fly RC's
Expedition - Chevy Equinox