Yes, it is possible that a large ape inhabits parts of north America, but there needs to be hard evidence not excuses as to why it always slips away.
You know every year there are thousands of Jackalope sighting in Texas annually. We've got the pic and the bones to prove it too, and yet no scientist has decided to base a career on chasing that rabbit.
The most entertaining part of this series is the field video where the "researchers" throw every single tenant of tracking, stalking or tapping wildlife right out the proverbial window. With these guys on the job, even the Sasquatches must have a good laugh.