For the backup only camera, I have a separate camera (only one) on my FW, wired to running lights. It is wireless, and the monitor in the truck has no trouble connecting to a camera 50 ft away. It DOES add another monitor to the cockpit. Running lights must be on for the camera, but NO connection to anything else.
Our situation right now is we need to sell our FW and plan to buy a used Class C or small Class A, due to age and health. Whatever we get will have or receive immediate remodel to include a compressor refrigerator and a decent recliner. Other "new" items I really like include:
Slam latch rather than Cam lock storage doors.
Side or bottom hinged storage doors.
Oven replaced with LOW MOUNT convection microwave. DW is vertically challenged.
Roller shades instead of noisy pleated shades
Televator option is nice.
Larger bedroom side tables with power for CPAP.
Better wet bay with valves to set for varied needs.
No carpet, or very little carpet under the dinette.
Despite my age, I do not like the '15 vintage "colorful" decor. I much prefer the current neutral monotone. Either can be changed fairly easily.