Fortunately our thoughtful, considerate retail establishments have set a well stocked table for tarp afficionados. Just look at the selection from REI - from $5 to $300 (reduced from $400) and this doesn't include some of the more specialized,exotic products available elsewhere.


www.rei.com/search.html?q=tarps&pagesize=90&ir=q%3Atarps&page=1


Can't get this link to work but go to their site and you will see the selection.

When all is said and done, a nice overhanging rock shelter or similar is equal or better to anything you can bring with you, whatever the weight or cost.