Actually, my favorite small line for rigging shelters,, etc. is mason's braided twine, which is available in reflective colors. It's lighter than paracord, and adequately strong. Paracord makes great zipper pulls (patterns have been posted by Tony E) and you have the flammable strand for emergency fire starting, at least with the paracord I prefer.

If you are unsticking vehicles, you probably are best off with a chain. On one occasion, I broke a good climbing rope pulling a vehicle across a stream. Pretty spectacular failure. Do stand to the side if you ever attempt this.