Lucky enought to have a garage I rent to store it in Maryland. I do the following:
. Change oil/ check fluids
. Fill up gas tank
. Wash car
. Cover car to avoid any scratches while getting into the garage.
. Battery tender - Can pick up one at Walmart or just start car once every 3-4 weeks.
. Lucky enough to have some desiccant bags (absorbs moisuture) put them on floor or under seat.
. If you can drive it a few times during the winter then the tires should not develop flat spots (check pressure). Otherwise you can put it up on jack stands or get "tire cradles that are suppose to help with flat spots.

Have done this for years with other cars and no problems come spring.

Hope this helps.

Jake80