The silnylon tarps are fantastic with good strength-to-weight ratio and they pack compactly. There is a lot of info on them on the web. The ultralight backpackers love them. The Hennessey Hammock folks sell a hex silnylon rainfly that can serve as a deluxe stand-alone tarp. It has sewn-in pockets at each corner that hold a length of lightweight cord. It came with my hammock; I doubt I would pay the $129 price by itself. But it now goes in my pack on all day trips as an emergency shelter.

Steve
_________________________
"After I had solaced my mind with the comfortable part of my condition, I
began to look round me, to see what kind of place I was in, and what was
next to be done"