I had a professor who toured through the USA. He said he always asked the churches if he could camp in their yard, most would let him. He also camped in cemeteries, but one morning he woke up and there were a ton of people around. He realized that it was memorial day. Just something that could only happen bike touring. Oh and check out http://www.junglehammock.com/, seems like some high quality stuff, kinda pricey though. Peace.