I just bought a 4 1/2 by 8 1/2 poncho/tarp today and i was wondering if anyone had any suggestions as to the best method to set it up for inclement weather? I am planning on taking it on the PCT next year and not really having too use it to much. I'm assuming that i'll just be setting it up with two trekking poles and some guylines. I was thinking about maybe making some with elastic in the them like i used for my hammock guylines to give the lines a little play and to give the fabric some relief.