Full tank, always. Prevents moisture buildup.
I live in Michigan. We get mean, long winters. I also work in the industry. We do workshops for customers on this fundamental practice for winter storage. This is widely agreed upon and is industry standard where it gets cold for long periods of time. FYI.
Michigan man as well, and I also agree with the notion of filling the tank all the way up with premium gas to prevent moisture buildup/rust. To preserve the gas over the Michigan winter it is recommended to use sta-bil. I prefer seafoam for the extra cleaning properties it claims to have for the injectors and gas. Let it run through the system, not just the gas tank!
Also, like mentioned earlier, it doesn't make sense to use a temporary oil for just the winter. Change it now if you feel you need to (filter included) and then put her to sleep for the cold season. Tell the dealer you don't need the oil changed when you take her into service in the spring!
Wash/wax the bike, lube the chain, and cover all metal areas in a light film of silicone spray or wd-40 to prevent corrosion. Lastly, don't forget to prop the tires up to avoid flat spots from the cold ground, use a battery tender (25 bucks for a good Deltran one) as well as plug areas where critters might make nest for the winter. My buddies bike was the residency of a family of mice last winter. They camped out right in his air filter bay...ate just about every damn wire there was in his bike!
or put your bike in the living room under a blanket like I do