Curious that, after all afternoon searching, they only found a backpack (dry bag?) and a notebook. Surely a self-proclaimed survivalist is going to bring more supplies if he truly intended to "live off the land." So where's the rest of the stuff that he'd presumably brought with him, and why was this this only thing found by the remains?
I guess if you’re heading out to kill yourself you don’t need anything other than transport, a viable method… confessional notepad optional.
IMO if the notebook is a confession that implies some remorse -whether for what he did, or himself, or some degree of both, who knows.
it’s the saddest possible conclusion to already tragic events.