You could use a blue tarp from a home store for a first tarp. Little heavier and bulkier but your young and strong. It will fit a collage budget. Meant to tell you that on your YT message. In my haste I forgot. http://www.homedepot.com/h_d1/N-5yc1...1#.UIFWI7TqpUQ
I used to use an SPE to hold two pads in cold weather. Has shoulder and thigh flaps as well. Easy to make. ENO has the HOT SPOT
which is basically the same thing.