The Skookum cast is interesting, but useless.
No one can tell what it is with any certainty at all.
Some people believe stongly that it was left by a bigfoot, but that means very little.
There is no actual useable evidence to show that it was left by a bigfoot.
None.
Now, if we had some corroboration....like what might have come to light if this particular bigfoot had been followed.
Or if we had some primate hairs, or DNA (we don't have either no matter how many times it is claimed we do) it would certainly be harder for me to say the print could not be connected to bigfoot.
Regarding primate hairs, though....
I notice no one taking precautions against their own hair falling into the mud while making the skookum cast. People are leaning right over the mud and whatever is on their clothes and their bodies is falling all over the print and contaminating it. We know that someone actually stepped in the mud, as well.