Have you ever done it yourself?
I ask simply because whenever anybody makes it sound easy I don't believe them. I suppose it depends on where you live but not all wild areas are hospitable to human life, or at least, hospitable to living easily.
Also, the "people in the past did it!" isn't applicable here at all–those were people who were not only raised to survive in their specific environments (and even then, frequently died on the whim of nature like any other living being) but they also lived in large groups because cooperation is important here.
If you end up homeless I say head to California (sorry for the US-centric element here). Relatively nice weather, lots of social services, and the occasional job that requires no socialization (in agriculture).