It's hard to say for sure. Some of his stories seem far-fetched and lack solid evidence.
I'm not convinced they are all true. There are often contradictions and unanswered questions in his narratives, which makes it difficult to take them at face value.
Well, it's a bit of a mixed bag. Some aspects of his stories might have some truth to them, but others could be exaggerated or even made up. You really have to do your own research and critical thinking.