I keep two quarters in my wilderness PSK. Why? Because I always have <img src="/images/graemlins/grin.gif" alt="" />. Seriously, I keep them in there because I have this idea that someday I might be in trouble out in the boonies and find an old-style payphone, maybe in some disused ski lodge or gas station or something. I may remove them the next time I do a gear check because I'm not sure how likely such a scenario is anymore.