It's good to hear you guys talking about wilderness skills and activities. It's an old stereotype that starting up an ideologically based, self sufficient community out in the woods is a "pipe dream." The reality though is that surviving the coming hardships and rebuilding a better society while living in the major cities is the real pipe dream. In fact, there are several "communes" where I live in the wilderness of interior Alaska. I don't think any of them are fully self sufficient, but they come quite close. Furthermore, activities like trapping, subsistence fishing and hunting, and general wilderness recreation are popular among most of the locals, even as recreation for those with "normal" full time jobs (there really isn't much else to do...). This area is attractive because of arable soil, abundant fish and game, general uncrowdedness, cheap land ($1,000 / acre is common), NO property taxes, NO zoning or building codes, and just because it's really beautiful. Dragging some more enthusiastic and right-minded people up here is definetely in my best interest, and I'd be happy to answer questions, either about far northwest North America, or about remote, subsistence living in general. Also, here's a bunch of my pictures from the area: http://img257.imageshack.us/g/dsc0434y.jpg/
A few posts back, something was said about Vancouver as a destination for this sort of thing. Bear in mind that Van. is a major metropolis, and will not support anything beyond purely recreational hiking and backpacking. That said, it is probably my favorite among cities I've been to (I went to university just across the border in WA). If you're looking for a lifestyle more than an activity though, the more interior regions of British Columbia are where you want to look (Pemberton, Golden, Revelstoke, Cranbrook, and many others). Just get on Google Earth and look for farm fields.
Although recreation as an end to itself is becoming less attractive to me (as compared to subsistence activities), I have a long history of backpacking and mountaineering, and I still enjoy exploratory, off-trail backpacking trips, and I'm considering the purchase of a small boat for floating wilderness rivers. There is no doubt that these sorts of activities will get you into better shape than you've ever been. The physical fitness is merely a bonus - it's the mental fitness and wellbeing that stickes with you.
-Will, Delta Jct. AK