Gen Wire
Here's what I found out - in a nutshell, anything is possible. It just depends on how much trouble you are willing to go to have run the wire up there.
The "roof" of the under gooseneck area is constructed of steel tubes. Pressed up against these steel tubes is the one piece fiberglass that wraps around and forms the front wall of the coach (lower half).
The current wires for the hitch hook up are running through these steel tubes through pre-cut holes through the steel. It is possible to "pull" a wire through the same path as these wires - it will just not be easy.
The only other way to do it would be to remove the fiberglass sheet, which is not only time consuming (you have to remove the cargo door, the hydraulic switch, light, etc.) but will almost assuredly destroy it - and they run the wiring and replace the sheet and components.
So there you are. If you can find someone who is really good at fishing or pulling wires through three turns - that's the way to go.
Otherwise, you could consider just housing the wire in your front storage area until you reach your desination and then simply pulling it out (possibly through the front storage compartment floor) and pluggin it in.
ST