Eric:
The areas you described for the paint protection film are correct. The one area that I would add is the small lip on the rear clamshell that curves up and faces the rear tire. That area gets a lot of rocks, so putting film on that will keep the paint in tact.
The rear view camera I purchased several years ago is this one:
Buy 4UCAM WiFi Backup Camera for iPhone/iPad and Android: Car Safety & Security - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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The camera mounts on your license plate screws and the system creates a WiFi hotspot that you can access on your iPhone or Android phone using an App called SightWiFi. It's super easy to use once it's installed. Great for seeing what's around you on the highway as well as backing into spaces.