I am new to geocaching, but have spent many hours in the woods in my area (Maine) on my ATV and foot alone and I do not have a cell phone. I have had near misses with moose, deer, bear, coyotes, and even an ornery old beaver once. I have also had the normal slips, falls, sprained ankles, etc., both on foot and on my ATV. It probably is not the smartest thing to do, but there is nothing like the feeling of being out in the middle of nowhere all alone. It does help in this state that we have no poisonous animals and it's hard to be more than a mile from water at any given point in the state. In reality, is going out alone putting yourself in danger anymore than say, skydiving, bungee jumping, or other similar sports?