If the soft top has to be used in the rain overnight

. . . what are the pros and cons of:
- putting a water repellent car cover over the whole car?
- putting a small waterproof tarp over the soft top?
- putting a small waterproof tarp over the soft top and then a water repellent car cover over that?

I'm considering the last option. A small tarp would keep any water that gets through the car cover (and any lint from the inside of the car cover) away from the soft top, and the car cover would keep the edges of the tarp from flapping in the wind against the paint.

Not that we ever HAVE any overnight rain in Washington state . . . but if I was at a out-of-town motel with only the soft top and a storm rolled in from, say, Orygun . . . .