I decided to make another plastic tarp, with some improvements that I have learned over the years, and document it on my blog:
http://cesarandthewoods.blogspot.se/2013/08/update-and-improvements-to-my-favorite.html
Will probably buy another roll of plastic to mess around with, unless I can find some Tyvek over here, which I have been very curious to try out too. I think Tyvek would make for a great winter tarp, just to keep the snow/wind off of you, and it's much tougher than regular plastic sheeting. Also, great camouflage in the snow too, if you are stealth winter camping ;)
