Water is important. You can live for weeks without food but not even days without water. If I'm going to be able to live at camp long term I'll need clean water. Even if I can find sufficient food if I can't find water I'm doomed.
Fortunately we've got a pond, even in the worst of droughts we've got water. I've seen the pond down several feet but never dry. Unfortunately we've also got beavers. Beavers are an issue because they carry giardia, a little parasite thats no fun at all.
An ideal way around this would be to sink a well, it'd be awesome to sink a well right next to the camp and have a pump inside but that would run into serious money so it ain't happening. Instead I'll need a filter.
At home we've got a Multi-pure filter, ours sits under the sink and is pretty terrific. I could rig up a similar system but I'd need so way to feed the filter which would be a pain. Enter the Berkey filter, its a canister filter, pour questionable water in the top get clean water out the tap at the bottom. I like the stainless steel construction and the replaceable filters and they're priced reasonably. There are other systems that use plastic buckets for "emergency water filtering" but I feel like the Berkey is a much more significant unit and if/when I make this great experiment thats probably what I'll get.