I like what you have done with the compressor and air tank. There was recently a test in Four Wheeler regarding air compressors, and I was surprized that the ARB and Quick Air 2 didn't do so well in their test. The winners were compressors that I had never heard of.
Another idea for self sufficiency on the trail is the Premier Power Welder. Besides being a welder and battery charger, it will run power tools and a Craftsman air compressor (they give the part numer for the compressor. I don't know how big it is). You also get a 160 amp alternator for your winch and lights. Pretty cool, but I think the price is around $800.00.