@Bill977 It's always a little discomforting when a guest is extremely uncommunicative. It can heighten your worry of something being wrong, for sure. What are you worried about in particular? It's highly likely this guest just wants to unplug from the world, and may even not have any devices turned on. Your cabin sounds like the perfect place to do that. Do you have anyone who keeps an eye on the place for you, since you're not right there? If so, I would let it go. If he needs anything, he'd no doubt let you know.