There is so much evidence for them out there, pictures, films, sound recordings, track ways, hair and DNA. Then you have Native American history, American pioneer history, Viking history. European history, all writing accounts of seeing, dealing with, or fighting with hairy wild men.
Even president Theodore Roosevelt of the US has seen one. Hundreds of police, military, special ops, doctors, lawyers have all had and reported encounters, thousands of first hand witness accounts just in the US and Canada, and probably thousands more not reported for fear of ridicule, let alone the rest of the world and every continent, with their own equivalent and slightly different variants of the species.
Sound recordings that are not on the lists of any known animal, that can create vocal signatures, above and below the human range.
Track ways of footprints of adults and juveniles that would be near impossible to fake unless you spent, thousands of dollars and a lot of time trying to produce, in such remote areas, that it would be pure chance that anyone would find them.Dr Jeff Meldrum, a footprint specialist, has hundreds of authentic casts that show mid tarsal breaks.
DNA so close to human DNA it is usually marked as contaminated and discarded but some scientists are taking it more seriously now and delving into the nuclear DNA.
http://sasquatchgenomeproject.org/
You have top primatologists like Jane Goodall, saying we have more evidence for Sasquatch than we did Gorillas when we started looking for them, and believes they exist from the evidence she has seen.
There are some very serious field studies going on, these guys are worth listening to.
They may bury there dead like other primitive / relic hominids did, even Neanderthals buried there dead. How often are dead bear, mountain lion or wolverine skulls or skeletons found. Scavengers will strip a carcass and porcupines will eat bones and teeth for the calcium, nothing lasts long out in the wild, if it has usable nutrients.
The problem is a lot of people think of them as an animal, when they are probably an extremely intelligent relic hominin, and incredibly physically superior to humans, and attuned to their environment in ways we cant understand yet.
If they can create sounds above and below our range of hearing they must be able to hear it themselves, which means they can possibly hear trail cams functioning, and maybe even see the infra red light the cameras produce, as they are mainly nocturnal. Bears can smell the chemicals in plastic, in trail cams, and frequently try and eat them so why not a Sasquatch smelling them and avoiding them, knowing it was a dangerous human that put it there.
There is plenty of real evidence out there when you actually start to investigate these things thoroughly.