Hello & Welcome Neal:
I have run wires from the storage area to the inside of the coach. There are several ways to do this I would run the cable from along side the frame through the bulkheads to the front of the coach.
Next I would find a place where you can drill through the firewall (Check both side before you drill).
Depending on the year, on my 2001, once inside I can run the cable up between the windshield in the channel to the rear of the TV and into the cabinet where the receiver is located.
On some years you can run the cable in the channel on the side of the windshield.
You will have to look at your coach for the best possible route.
I hope this helps a little bit.