For several Winters, we left one of my Fiancé’s cars out in the driveway for the Winter; no awning or anything. We put a cheap car cover on it and then covered it with two overlapping tarps that were attached with bungy cords under the car.

The car was a convertible and had a bad leak which is why we tarped it. We cleaned the car each Fall before doing this and in the Spring, when we uncovered it, the car looked as clean as the day we covered it up the previous Fall.

Just an option to think about.