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For shorter trips, I use the Katadyn Hiker Pro, and use the attachment to pump directly into my water reservoir in the backpack (where the quick disconnect for the drinking hose is). For longer trips or group trips, I take the Katadyn Base camp gravity filter. I've used the MSR Sweetwater Guardian in the past, but misplaced it in the many moves over the years. And my wife bought me a steri-pen as a gift, but I've yet to actually use it.
outdoorgearlab.comsearch water filters or whatever you need.all testing is done for you
Any input on this one Katadyn Gravity Camp 6L? I will be on an 8 day back country hunt.