I think it seems like bushcraft has taken a dip, but only because we've just come out of winter, and a fair few folk are fair weather campers (nothing wrong with that though, least they are getting out sometimes). We should see another burst before too long I'd guess. Another contributing factor, is the lack of cash going about. People have to put in the extra time with work, or simply can't afford to take holidays.
Having said that, quite a lot of forum members (across all forums, not just ours) will often disappear for a month, or two, or three, or four, before coming back into the "lime light".
I don't think people have stopped wanting to do these things, it's simply a case of having the time to do them, and if they do, having the time to get on a forum (or other public space) and share their outings.