consider wireless
I went with a Yada Digital Wireless Backup Camera with 4.3" Dash Monitor. I got mine from Costco for about $100 but Amazon and other retailers sell them too. I mounted the camera just over the receiver, on the silver part of the bumper cover. It needed power, ground and reverse. I tapped into the trailer wiring harness. Really easy. The dash monitor / receiver just needs power. I mounted it under the radio. It works great. Night vision is excellent. No holes to drill and no wires to run from back to front.