BF,
Wheeewww ... I got dizzy reading this whole thread.
IMHO, just use the K.I.S.S. approach and put a great big aftermarket alternator in your Class C and be done with it. That way you'll not have any serious battery recharging concerns if the sun don't shine and/or if you don't want to have to lug out, gas up, and refuel a portable genny.
I'm getting real lazy during our camping trips. It's more and more tempting just to pay the idling gas price and fire up the super quiet main engine and let it's G-whatever 130 amp Ford alternator dump up to 80 amps (so far .. a new record amperage we hit on our Thanksgiving camping trip) into the coach batteries for a quick one hour top-up. To bring the batteries closer to 100%, I have to break out the little Honda and run it for a few hours.