“Yet Sasquatch also seems to be something more than a simple flesh and blood creature.”
According to the official military officer assigned to investigate it, we have some kind of technologically sophisticated “other” on the planet, which is between 50,000 to a million years beyond us, they appear to pop into and out of another dimension we cannot access, and their ships appear to actually warp space and time in a bubble around them, as they make 8,000mph right angle turns.
If they wanted to tour our woodlands, like a park, I would not be surprised they would don a technology-fueled costume to try to look like a scary, massive biped, which belonged in the woods. That is how I would do it. Bears would leave me alone, if people saw me nobody would believe them, and I would have all the physical joy of trekking on foot through the woods.
I would be more surprised if they found they were some flesh and blood hominid which had a breeding population in the woods.
That is a clever explanation that reconciles a lot of puzzling evidence. I like it and will shamelessly borrow it as my own.