The ski camper's water problem is much the same as that of the Ancient Mariner which caused him to lament
Water, water everywhere, Nor any drop to drink . . .
The need for water varies greatly. It averages about two quarts per day, but is more than doubled by excessive perspiration or by the extreme drying effect of air at high altitudes. Unless this physiological demand of the skier for water is fully satisfied, his efficiency and even his health may be impaired. This does not mean that it is harmful to be thirsty. Since a gallon of water can be taken from the body without harm, a skier can travel a day without drinking, but at the end of the day the water should be replaced. Of course, if water can be obtained from normal sources during the day, it will save fuel required for melting snow, and, at supper time, will save space for more solid food. It should always be remembered that thirst is the best indication of need for water. To this general rule there is one exception: when one is approaching exhaustion, thirst should not be satisfied. Under such circumstances a half cup of water each quarter hour should be the maximum allowed. Salt should be added freely if the skier has perspired excessively.