Their information on Dahinden may be found here: http://www.sasquatchodyssey.com/hrene.html
It is mainly the work of Peter von Puttkamer. In the opinion of this blog it is one of the best, most interesting works on film about the Bigfoot phenomenon. It is a study not only of the cryptid hominid/hominoid, but also of the people who follow the beast, and the cultural aspects of the pursuit. Captured in time and animosity around 1999 are the old-school "Four Horsemen" of Sasquatchery: Peter Byrne, John Green, Rene Dahinden, and Grover Krantz. The documentary is special, too, in that it was filmed just before the deaths of two of the "horsemen," Rene and Krantz. It catches Byrne just before his more-or-less retirement from the pursuit. Green is still alive and squatching, though he unfortunately could not make it to this spring's "Bigfoot Round-Up" in Yakima, WA. Also present in the film are some of the newer researchers such as Robert Michael Pyle, Matt Dunlap, and others, and has bits with long-timers such as Lillian and Datus Perry, Ray Crowe, etc. Without being mocking, this film also bears a lot of humor about the subject, which will be a relief for those overdosed on MonsterQuest episodes.