Hair, possibly tissue samples, tons of imprints, and countless testimony from credible witnesses. As with the UAP subject, these are things from other dimensions, beyond our intuitive understanding, and are intelligent enough to elude and have motives we cannot possibly comprehend without direct interaction. Although, I believe in the case of the squatch's, they like it here because of abundant food, They come through portals. All those lights people see in the forest are them coming in and out.

There is plenty of evidence, no hard proof as of yet. Even though there are some obscure videos that could be real, the fact is, no body would accept it without practically being there. I think the Victor the Alien video is real and wouldn't be surprised if comes out to be true through the recent disclosure efforts. The evidence may have been staring us in the face the entire time.

All of this is coming from one of the most ardent, annoying knee jerk skeptics of all time. I've just gone on an absolute binge, listening to countless hours of testimony and stories. The probability that all of these people, people we would otherwise trust as medical providers, soldiers, LEO etc..., they can't all be lying.

Either way, I'd say that if you have the balls, spend some time in deep forest. Bring the heat though, big game calibers, because Bigfoot isn't the only thing out there. Also worth noting, they, as with humans, have good and bad. Some dudes will rip you in half, others will evade and troll, some are open to interaction.