Mike,
Why do I have the feeling that Albany, Oregon would be no better then Albany, NY, also on US Route 20, for one of those inflatables. To keep out moisture and dust you would need some sort of air processing unit. The inflation fan changes the air 3-4 times an hour according to the advertising, and according to their FAQ, it keeps everything "completely dry"........not really. Temperature (sun heated topsides vs radiated ground cooling on the chassis) and air flow differentials (stagnant air, like the trunk, the undersides) will still tend to collect moisture And dust free?? Nope - not a chance.