FSS questions and winterizing for storage

My husband is a little skeptical about the intervals of the FSS and we were wondering what everyone else does, but it looks as though people do whatever they think is best - in most cases it looks as though a more frequent schedule is followed. My car is a 2002 and is still under warranty.
We plan to put it away for the winter and think we should do that with fresh oil. He has winterized vehicles before and has added fuel stabilizer to the full gas tank. Has anyone else winterized? We live in Southern Ontario and it will be parked inside for the season. I also need to pick up a car cover - any ideas where to find one that fits well?