Here is a link to the cheapie trash bags I was talking about. I think they are actually used by the road dept in Colorado. Just cut a place for your arms and head and you are wind and water proof pretty much <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />.
http://www.outdoorsafe.com/index.htm -Luck <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />