Thanks to one and all for the timely responses. I am encouraged and perhaps I was searching for a solution for which there was no known problem. :S I'm going to the rig tomorrow to scout locations for the antenna wire run. At this point I am thinking inside the forward hatch opening above the cabover bunk as there would only be a very thing layer of plastic above it. I think I can run the wire under the trim across the cabover ceiling and down to the cockpit and still get there within the 23' I have to work with.
Our E-350 has 3 cigarette lighter outlets (2 on the dash and one in the glove compartment and I have the one in two out adapter with a USB port - $12 at Walmart), all we run when traveling is the GPS (we charge things off of the 250 watt inverter at night), so I don't see a problem keeping it simple and using one of the DC outlets for power. Keep those tips coming folks and thanks again! :C
