Bears exist. Alaska exists. People who live and work in bear country in Alaska exist. There exist people who make their living by cutting trees, guiding tourists to wilderness areas, and coordinating hunts for large mammals, including bears. These people understand that when a bear decides that what it wants is in your house then it's time to kill that bear, and they have both the firepower and the gumption to do so.
I just don't see that ABP has claimed anything that would be implausible for any of the thousands of guys living in the North Woods of Alaska and across boreal Canada. Heck, there are probably several hundred of 'em who also have hot Asian wives.
Of course he could be an expert yarn-spinner and all-around bovine excrement artiste. Maybe he lives in his mom's basement in Peoria. He's posted a lot of photos, however, that seem congruent with the lifestyle he claims to enjoy. Yes, he could be a master manipulator who deftly crafts stories to weave through the photos he's found, but there comes a point at which it's a lot more parsimonious to say "Cool, that snow machine looks like it really is a workhorse" or "Hmm, that hot Asian woman in the woods might actually be his wife."