Hi Harley!
I'm a SAR volunteer myself.
Realistically speaking, I think people might fill out such a form when going out on longs trips, but not on dayhikes. Such a form might be of use to someone that has few friends or relatives that don't know their whereabouts. Most people simply tell their friends or work collegues where they're going, or even better, then bring them along! :-)
I'd rather take the time it takes to fill out the form to double-check my gear and make sure i'm not forgetting something important. <img src="/images/graemlins/grin.gif" alt="" />
My 0.02$.
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"The only easy day was yesterday."