Well, IF Bigfoots exist, they sure don't live around here, although there have been UNSUBSTANTIATED RUMORS of them, for years.. Maybe they moved in with the polygamists over in the next county..? Would be hard to disprove..
I have spent enough time in these mountains, over the last several decades, that I don't believe the presence of such critters could have eluded me... I have seen black and grizzly bears, wolves, foxes and coyotes, badgers, bobcats, mountain lions and wolverines, and I know their tracks.
The horrible screaming noise Blaine described would have come from a cougar, in this neck of the woods.. It is the most unnerving sound you can imagine, if you've never heard it..
Rollling rocks are a common phenomenon in these parts for any number of reason, including squirrels, porcupines and racoons, not to mention deer and elk, and quiet earth tremors..
Those funny little darting "UFO" lights..? Yeah, I've seen them too. The last couple times were here in or near Cody, late at night.. Once was from the ridge along the crest of Rattlesnake Mountain. I have no clue as to their origin or purpose, but figure if I really need to know, it will all be explained some day..
Would I shoot a Bigfoot? Only if I or my stock were in immediate peril.. Not just to prove I saw one...