I don't agree with disconnecting the battery. Your car's DME has learned not only your driving pattern, but has compensated for any irregularities within the operating system; i.e. fuel, timing, vacuum leaks, etc. Once disconnected, your DME will revert to factory defaults and will need to "re-learn" all pertinent data, which could lead to a poor running condition, or possible damage to the engine, if it had been compensating.
I have always used a battery maintainer on my cars, since they have generally been stored from November to April and have never had an issue. Also, your car will not pass emissions until the DME has completely recycled and all systems set to a "ready" condition.
The newer the car and sophisticated electronics, the more pertinent the issues become.
Also, modern radial tires do not flat spot the way older generations may have...a bit of an overinflation at storage time and good drive come spring, will render them just fine.
