I am leading towards wired with 3 cameras. Camping World has a few on there website.
Jim I will have to hit him up. Looks like the biggest issue is the connections between the truck and RV.
Just my opinion and observations.
I picked up the 4 camera kit at the 2013 Goshen rally.
2 side cameras, 1 dual cam rear view unit (this is a single housing with a close up and wide angle adjustable cams)
Necessary cabling
Trailer to truck umbilical
Truck cabling to a dash monitor
The wiring through the trailer has it challenges.
The side cams were a complete waste of time and money
The umbilical and connectors have been a thorn since installation. Cams frequently drop out and it takes a lot of wiggling of the connectors to get them back on (yes I have taken them apart, several times)
The video quality is mediocre. The rear view is good to see that you have a vehicle behind you, although you would be hard pressed to tell what kind of a vehicle other then if it is a car or truck or motorcycle.