It is easy to find dedicated electrical
inlets and dedicated electrical outlets. However my interest was to have one little "hatch" with a water tight cover for times when it is not in use that I could use for whatever purpose I wanted such as electrical power cords for whatever purpose, antenna cords, internet hookup, hose from an air compressor, exhaust blower, vacuum cleaner hose, etc.
I do have a dedicated main power inlet and also a dedicated electrical inlet up by the trailer tongue for the generator
. Plus an exterior 12 volt outlet on the back wall near the door.
That is because I am not just out there on the road like most people in the forum doing only vacation camping activity, I am also going to be doing a variety of work task for generating income so versatility of function from a small hatch makes perfect sense for my needs.