The blanket approach might work...if I can keep the blanket on the vehicle. It is windy here much of the time. We often have steady 10 to 25 knot winds with gusts to 35-60. I live on a cul de sac that faces west. We get all the leaves and trash from the neighborhood. I could probably close each end of the blanket in the front doors of the F150 to anchor it. Have you ever had the blanket get wet and freeze to the surface of the windshield?
That’s what I do, close the doors on the blanket. There is a skill to this, too since the blanket will wick rain into the vehicle if the ends are inside, so you want to have small folds caught in the door and the ends hanging outside. If the blanket is wet and freezes it will be stiff, which is amusing, but it won’t stick hard to the glass, maybe just a little but it comes loose easily.