Thanks for your service! Still haven't gone through the paperwork, but might help to know what your're doing. I have a simple wireless I use on my other trucks that woks pretty well, even has night vision too for around $100. Camera has magnetic base or can be screwed on. They have these at Camping World.
What I installed on my 4500 and 5th wheel requires a lot of work to run wireing and mount equipment. I drilled a whole in my transmission hump to get connectors in the cab, ran power and camera leads through dash, removed A pilar molding and mounted monitor on my sun visor.
Happy to help either way.
Ron