I'd be tempted to just carry either one of these little guys:

SAS Survival Guide - Collins Gem Edition

Survival, Evasion, and Recovery - Multiservice Procedures For Survival, Evasion, And Recovery, a condensed version of the USAF survival manual.

You can see Doug's review of them, and others, [url=][/url] [url=http://www.equipped.org/books.htm#latest-1]here[/url]...