i checked the never have enough time box - which is mostly true, but if I had more time for leisure, I'd spend it fishing or exploring the lakes, or paddling farther, rather than reading a book.  besides, books are heavy.

I brought a book with me on a climbing trip to Joshua Tree NP this April - I'm always the first one up in the morning, but my climbing partner is the last one to crawl out of his tent - book came in handy waiting an hour or more for him to get his ass in gear.   so I can see where having some reading material on a group trip might come in handy.