Earlier I added a Pioneer NEX-6200 which has an input for a backup camera so what the heck.
Picked up a Clarion camera, with distance markers, which seemed to get pretty good reviews.
https://www.amazon.com/Clarion-Corporation-America-CC510-Automotive/dp/B00B43LK7E
The really nice thing about the camera is the connector that is attached to the camera is really narrow and I was able to thread through the same grommet that contains the license plate light wiring. There was a second really small hole in the upper left corner of the trunk that lead into the engine bay. I put a grommet in that hole so the wire wouldn't abrade.
That was all for tonight.
Tomorrow I'll route it from there up to the radio.