Cool.Just completed the install (the rear door part) on my '07 passenger wagon. I understand why you went with the license plate lights instead of the backup lights. The backup lights are about 6 miles of wire from the license plate, and routing the wire would be a huge hassle.
Next I'll look into permanent installation of the video display.
I'll post some photos soon. Thanks for the idea and the writeup.
My camera is still working well. The signal does seem to be affected by humidity and moisture, as others noted, but it hasn't ever been bad enough so far that I can't see what's behind me clearly.