Personally (and w/o statistical data for support), I agree with all said EXCEPT I would not run the engine. Cold startups (even in a htd hanger) aren't that good for an engine and tend to dilute engine oil unless the oil is brought to full temperature for a period of time. It takes a long time to bring 10 gallons of engine oil to temp at idle speeds.

Additionally, preferably before storage while the engine is running to distribute fuel throughout, I would add some sort of fuel treatment to prevent algae.