The second link contains a link to the full story, but the link doesn’t work. However, this does give evidence to the growing sport. Finding evidence on the growth of it would be the national aspect of the sport, as well as its origin. To localize it I would find specific examples of geocachers in the area to interview and possibly go on a geocaching adventure with. The “official” geocaching website is a branch of the company “Groundspeak” which offers contact information for press in their PR department. This is where I would find the information to prove that the sport is, indeed, growing. I see the story as being as informative of the sport as it is newsworthy.