Just don't see a value prop to make this feasible. I go to festivals, skiing, camping with friends 2-3 times a year.<p>At a festival, cell service is fine. Camelback with gatorade/water mix is the crucial piece of equipment. Just keep an eye on it, as random people will try to drink from your straw.<p>For casual skiing we set times/places to meet up in case we get separated. Again, cell phones work fine on most mountains. Don't want to throw this bulky, expensive (not water/shock proof?) thing in a plastic bag in my pocket. If I'm going back country, go with a buddy. Keep an avalanche kit (shovel, beacon, air tube) in the backpack and bring a $30 pair of 6 mile, 2-way, replaceable battery, shock/waterproof radios.<p>Camping, the point is to get away from constant communication and leave the phone off, in the car. Again, bring the actual radios if you're going in deep.<p>Smartphones are great for day-to-day life and work, but I feel like half the point of the vacation is being able to untether.