I have a 2009 Salem TT (as shown below).
I plan on installing a rear-view camera and will need to punch a hole in the rear wall to do so. I'd prefer to wall-fish the wire down through the wall as I hate ugly wiring.
What would my wall have inside for insulation? Is it something I would be able to fish through, or is it some type of expanding foam? The info I have indicates "R7 insulation", but I have no idea what that means!