I installed a Rear View Safety unit I bought from Costo. I got the wired model for the same concerns you mention. Also, you still need to wire the camera/sending unit in to a power source. With the unit I got, there is only 1 cable (60 feet long) that goes from the camera to a junction box, which I installed in the cab. From there, there is a cable to the monitor and another set of wires for power, easily wired to the fuse box. I'm not sure a wireless model would be much easier to install, but Costco does sell one.
