Thank you all so much for your help.
I've gotten a lot of great info from these boards, but this is the first time I submitted a question... and WOW... what a great response from everyone.
This is how it played out:
I ran a temporary ground wire (about 25 feet) from the dinette table O/H light fixture... easiest thing to get to and wired it per your diagram.... BINGO... worked like a charm.
Next, I was lucky enough to have a 110 outlet (in the rear bath) almost right across from the light switch, and the wall is thick enough so I could fish a wire from the ground in the 110 outlet to the remote controller.
I also put the switch back in the line and it works just like you said...
Put everything back together and you can't tell I even did anything... no visible wires or anything.
Thanks again so much... you made my day.
2014 Mirada 35DL
2006 Saturn Ion
Blue Ox Tow Bar
Brake Buddy (proportional)