Thanks, Larry -- the more tips I get - the more likely I'll be happy with the system.
Don, I intend to make the panels into a roof mount that's easy to lean up to the correct angle (Wendover's at 40.85 degrees N - figure from there on what's the correct angle), but also lie flat on the roof for driving down the highway - with the panels themselves stored inside the trailer in case of hailstorm or low-flying trees.
The big battery is in the nose of the trailer and will stay there. I'll put a couple of 12VDC outlets along one wall and no more than 10-12 feet from the battery. I expect the operating position for the audio console will be there - and we don't really need the 12VDC elsewhere in the trailer. I'm now vacillating on the need for an inverter - but'll probably put in a 400-watt or maybe smaller. If we need good amounts of 110VAC it's easy enough to fire up the little generator - and it's pretty quiet, too.
I wonder, though - when I have the DC system wired up and need to charge the battery (with the solar disconnected, of course) how 'bout if I power up the DC to AC inverter, running of the 12VDC system, and plug a regular battery charger into the AC outlet and hook the DC leads to the battery. . .