One of the more puzzling stories, the Bart Schleyer story in the Yukon Territory, Canada. Flown in by airplane and dropped off for 2 weeks. Experienced mountain man and big game hunter. Disappeared while all his food and gear was left behind.
While not an everyday occurrence, people continue to vanish in the bush. If you were an experienced woodsman, and wanted to disappear - start all over again, going solo on a wilderness trip could be the way to do it. Stashed food and supplies, and a way 'out' .... Leave your gear where it'll be found, lay false leads, and have a two week + head start before anyone becomes alarmed and starts a search. You could be in Brazil or ? before the search even starts.
In a previous life, I worked as a big game guide .... the celebrity 'hunters' that would book with us occasionally were anything but that.
A variety of things can happen. My next door neighbor's adult son walked into the bush here, was never seen again. The RCMP contacted me and asked for help. To no avail.
Always a fascinating and very sad time for the folks 'left behind' ......