I guess you are just removing the safety light to gain access to 12V power leads...
I would think these lights are mounted to some DOT standard safety lights requirements and are required.
I would not permanently remove any DOT safety light.
Also keep in mind the wiring you are gaining access to may only be HOT when you have your running lights 'ON'... i.e. If this is the case your rear camera will only work when you have your running lights 'ON'. I don't turn on my running lights until the early evening and after dark...
Having never done this before I guess it is just as easy to turn on the running lights (Day or Night) when you want to use the rear Camera???
My thinking concept for a Rear Camera would be very useful to see what is behind your when traveling on the Interstate and wanting to change lanes etc and of course to get a good look at what's behind you for backing into a camping spot...
I have read that you really want to have your camera as high as you can get it on the rear of your RV and have it pointed down to reduce flair-up from vehicle lights behind you when using at night.
Note the camera angle in this google image photo
My truck rear mounted camera is mounted in the tail gate and is almost useless being used at night because of flair-up from lights. It only comes ON when I am in reverse.
Just some install remarks for planning thoughts...
Roy Ken