IMO everyone should go to one of these type of events atleast once. Mine has since lapsed but a few years ago I took EMT-B night classes at the local community college, it was alot of work, but very interesting stuff. I really wanted to take a wilderness first responder class but never got around to it.
This is a pretty good deal, most WFA classes run around $250 and don't include a CPR cert, normally $100 extra.