I travelled to Cuba on a personal trip. It was like a stag. It was for a friend. I read reports of something about Castro. I think the closest we came to Castro was a picture in the hotel of the president. Other than that, I was surprised to hear that story.
As I said, I qualified it with the chief of staff at the time and said, “I know that I won't only be travelling on this passport with my wife, so should I not obtain another passport?” She confirmed and basically validated to me, “No, you don't have to. You can just travel on this passport.”