Good idea Susan. Follow your nose! I carry the mini version of the SAS Survival Guide more as a reference than as reading material...but if needed I'm sure it would kill time just fine. A deck of cards is definitely going to find it's home in my pack soon. The anti-boredom cures that can come from that are too numerous to mention.

Here's a picture of me 'surviving' in the grand canyon with a good cigar: