On my tear drop, I have an exterior 'trap door' installed. I lift the door and push an extension cord through the hole to the interior where it connects to a power strip.
Since I installed it on the wrong side (passenger side; most all 'real campers' have it on the driver side), I would like to get a unit to install in the wall which has a male plug on the outside and a female on the inside, so the cord can be plugged outside.... if I can get one with a cable tv receptacle, that would be a real bonus, then I would not have to pass any cables through the wall and hooking up would be much easier.