Secondly, water is burned off once the engine reaches operating temp but to completely burn off all the water it has to be for a prolonged period. That's why they say short drives are worse for your engine.
This is very true. Short drives are definitely worse. In conjunction with water in the oil and winter storage, IMO starting your car in the winter, periodically, in a garage, idling--is not good. I just don't think there is any way to burn off the impurities of combustion while idling a cold engine--even for a half hour. In addition, you're probably leaving some condensation in the exhaust system. A good 30 minute run on the road will do the job, but not idling.
As for changing the oil, truth be told, our car has never been put away with 'brand new' oil. I've always managed to find another 1000 miles between snowflakes before having to pry the keys from my hands. I've used oil analysis since day one, and the oil has come back perfect every time. Heck, for an experiment one year, I put the car away with 5,000 miles on the oil, ran another 5,000 miles the next spring, and changed it (2 track events/several xcrosses on it). ..Sent a sample to Blackstone -- they wrote back and told me to extend the drain interval. The oil was perfectly fine. I typically change every 5 or 6 thousand miles. 64,000 miles to date ...and not putting around miles.
This business of changing the oil before storage, and after, seems ridiculous to me.
Steve