I did an install on a 07 Sport, with a Pioneer head unit.
Install the camera wiring from the hatch forward.
Silicone spray the conduit to make things way easier.
The rear emblem trim piece, and key switch would need to be entirely removed, to mount the camera (like OEM). Also, a little bit of dremeling to run the wiring.
Good time to replace the tail gate button switch, clean out the inside of the hatch, lube the lock mechanism, if needed. etc.
Just run the wiring along the other harnesses (tape) to avoid the wire getting damaged.
I used a camera from..
Backup Camera for 03-15 Toyota 4Runner. Their gear is top notch. (After a couple years, the camera is as good as new on our Taco)
Do it!