Rear Camera

I also have the voyager wireless setup as described two posts back. I love it and it has been very reliable. However, the OP also asked about "reasonable cost" . The voyager is NOT CHEAP! However it does work well and there is no need for running wires all through the TV and TT. One added bonus of the voyager system is that not only can you see behind, but it has a built in mic so the driver can receive directions orally from a spotter when backing into a site, without the need for yelling from the back on the TT to the driver!
Unlike many wireless systems, the camera and monitor "sync" to one another, providing a much clearer picture without "interference" than many other systems.