Seems our 2 small airports in the valley will not sell AV gas to civilians, only pilots. So after some interweb searching I've come up with plan B.

1. Drain tank and float bowl of all existing fuel.
2. Fill tank completely with non-ethanol fuel*
3. Add appropriate amount of Sea Foam to the tank**
4. Run engine to make sure treated fuel has made it through the carb.
5. Drain float bowl.
6. Park for the next 3-4 months.

* Most people feel that the ethanol is what mostly gums up the works. The only non-ethanol fuel I could find was racing fuel, 110 octane, $8 a gallon. Strangely enough, it is widely available.

** Sea Foam wins by a wide margin as a gas treatment over the more commonly cited stabilizers.

I have encountered the "NO AVGAS FOR YOU!" attitude at a larger airport once.  That is why I was glad to find a small county airport that is self serve.  The issue that they are concerned about I believe, is that there is no "Road Tax" on the fuel, and they don't want to get in trouble for selling fuel to someone that might use it on the road.

The racing fuel will be fine....however I would still use the Sta-Bil rather than SeaFoam - but that is a personal decision.  I bought a 55 gallon drum of gasoline without ethanol to use in my mowers and added Sta-Bil, and I used it for 2 years before it was all gone.  It still looked and smelled fine right to the end.