Percolation? Heat soak? Don't drive during summer??

Humid air wont evaporate gas as quickly (so saturated with water, it can't hold much else). Nevada air is a natural dessicant.

My point is, he's gotta START somewhere, agreed? Whether it's fuel, electronic, or "whathehellever", he's gotta get outta the forums and TRY something, right? Going to get a 5 gallon can of gas filled is a pretty easy thing to do. Whether he drains the tank, or feeds it from the remote tank, that will tell him real quick if the gas is the problem. It may not be, because as you say, the weather is different....and you're right. But what if his gas has say 20% ethanol? That levels the playing field, doesn't it? The fact is, WE don't know, because we're trying to diagnose over the internet. So he HAS to start somewhere.