I believe that "day trips" are one of the most hazardous outdoor activities we can participate in.
Why? Because most people who go on a day hike are not equipped to spend a night in the wild. Even an overnight backpacker will usually have a tent and sleeping bag (if they don't, it's because they're knowledgeable enough to build a shelter without them), but a daytripper will often only take nothing more than a couple of bottles of Evian, the clothes on their back, and a camera.
Sandals are probably great but make sure you have a couple of pairs of wool socks in case the weather turns sour. <img src="/images/graemlins/wink.gif" alt="" />
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"The mind is not a vessel to be filled but a fire to be kindled."
-Plutarch