Astro turf cleans super easy! You can clean with a garden hose if you want or if you don't want to get everything wet then just vacuum it and once in a while when it gets really dirty shampoo it like a regular carpet.
Slight angle does not work well for aerodynamics on trailers - its always recommend to go flat, unless you hinge them down on one side and create prop bars on the other to prop up when not moving.
Dump the idea of 6volt! its not necessary for your application. 12volt deep cycle batteries will do just fine! Convert everything to 12volt dc, throw away the ac/dc inverter, they just waste energy and create heat! You probably only need two 150amp cells anyway unless you are planning running an induction cooktop instead of a propane(I recommend propane - a little lasts sooo long) I also recommend a propane fridge costs a little more, but worth it. Heating I would cut out a hole in the top of your camper and install a little wood burning fireplace and if your in the cities than use propane heat. With panels, the power output will simply not be enough to heat you when its cold. For cooling - Try to park in the shade and if you are in death valley then your panels may be enough in the day time to give you ac for most of the day. If you are trying to go ultra green than you can make your own Hydrogen from water with your panels as you drive, but thats another topic..
Yeah looks like I will be using my propane a bit more than I thought. But seems like 60Gallons will last me a bit.
Going to definitely buy some electric fans and whatnot. If it gets extremely hot I will likely not boondock during that time.
Seems like shade parking is the best idea. So if I get a solar panel setup, I might get a few for the roof and a few as a remote array. My brother is certified to sell/install this stuff just have to get him involved.
You can always also get a small 500 watt wind turbine with a 5 meter mast/ cable stays attached in strategic places on the trailer you could have it erected single handedly in less than a few minutes. There are a few of them coming out of China now that produce about a watt per dollar spent(300 watts for 300 Us dollars)
I don't know how wind didn't even cross my mind.
I'm seeing some good prices for larger amounts of energy going that route. Low wind and Ultra low wind setups or even hybrid solar/wind.
You could even get a couple small dc 100 watt permanent magnet inline duct fans mounted on the roof of the camper to charge the system while you drive this way you don't have to rely on your cars alternator to charge the system. They look cool too like jet engines mounted on your roof