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When heading out on a camping or hiking trip, having to carry all your own gear means that if an item isn't useful, it isn't getting packed. Two of the most useful items are a water filtration device and a set of trekking poles.
from: http://ezinearticles.com/?Trekking,-Hiking-and-Camping---The-Two-Most-Useful-Items-You-Must-Pack&id=2742007
