Just get on or more of these:

http://www.actiongear.com/cgi-bin/tame.exe/agcatalog/level4s.tam?xax=26302&M5COPY%2Ectx=7824&M5%2Ectx=7824&M2%5FDESC%2Ectx=Emergency%20Preparedness%2C%20Survival%20%26%20Lifesaving%20Supplies&level3%2Ectx=results%2Etam&query%2Ectx=hammock&backto=%2Fagcatalog%2Fresults%2Etam

At that price, why hassle with making one, unless you want to learn how.
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