Here are some new pics I put up of the poncho tarp (In Baker set-up to give you idea) as well as some other gear:
http://trailjournals.com/picview.cfm?sort=autonumber&from=trailname&with=361&id=5257
and…
http://trailjournals.com/picview.cfm?sort=autonumber&from=trailname&with=361&id=5258
Both the tarps you’re looking at are extremely water tight! They’re made of sil-nylon which I prize as an excellent tarp fabric. The coating is impregnated and contrary to other tent taffetas, does not absorb any water (…or very very little!) The seams are the only areas where water may enter, inquire to see if they’re seam sealed. You can buy some seam sealer and do it yourself too.
Both tarps need a ground cloth to keep you off wet ground. I like trash bag sliced down the sides for a cheap lightweight cloth. Of course, make sure the cloth does not stick out the sides of the tarp’s coverage, or else you’ll be swimming! Also, set-up on level ground, soft earth, and you’re set!
You can also go with a bivy. Check in to the ultralight 6 oz. bivy (silnylon on bottom, uncoated 1.1 oz. nylon on top) sold for around $50 by Equinox. Also, Mountain Hardwear’s conduit SL bivy, or Bug Bivy (conduit weighs 1 lb. and retails around $100, bug bivy is 12 oz. and retails for $50 or so) Both look interesting.
Sweeper