Living in the Northwest, talking with witnesses and going on several non-sponsored Bigfoot expeditions myself, I would give the possibility of the creature being real a pretty darn good chance. BUT - BFRO has at times made wild claims that are hard to believe. 27 out of 30 expeditions having an encounter? I don’t see bear signs 27 out of 30 outings to the back country of Washington and Oregon, and how many more thousands of bears are there than Bigfeet? Heck I have been on many a deer hunt where I would have a hard time finding proof that they exist. 27 out of 30 to me seem to be just an enticement for novice first timers to pay BFRO’s high cost for a 3-4 day expedition.
While I’m not so involved as you, I think that it is dilatory to lump all these creatures together as inconceivable to exist.
I'd put the chances at over ten million to one. There is simply no credible evidence that a bigfoot type creature ever existed in North America. Besides that....factor the number of individuals required to sustain a viable population and you'd probably have numerous incidents of Bigfoot roadkill anually. When someone kills one with his pick-up truck I'll believe it. Until then, it's almost as silly as the notion that a population of pleasaurs exists in a Scottish lake.
Good post. Grover Krantz made a similar comparison (Bigfeet to bears) in “Big Footprints”.