Hmm...I just received a 2.4ghz wireless setup. Now I'm having second thoughts.
For me, it's the wiring in the cab that's a big deal. There isn't a short run available without massive disassembly of the interior of the truck. I've got my monitor mounted on the center of the dash, and I've got room for 3 cameras in my system. I was planning on a plate camera on the truck, a top down view from the camper (with view of the hitch), and then I was going to wire a provision for a rear facing camera mounted high on my 20' enclosed trailer. It's 50 feet behind me, backing is no fun, but the blind spots behind the trailer kill me. People are idiots. I'm already having nightmares of driving through seattle and portland next month.
I may have to reconsider my plan.