Nutrition is a very important factor in the success of a campout. Food is both a necessary fuel and vital for body repair. More food is required for strenuous activity, and specific mixes of types of food are needed for cold-weather/winter camping. Where a normal calorie requirement may be between ~2,000 and 2,800 calories/day/person, the energy requirements for a strenuous or high adventure trip are 3,000 - 5,000 calories/day/person and winter treks require 1,000 MORE calories/day than summer treks. This translates to about 2 - 2.5 lbs. of (lightweight) food per day per person, and the food should be nutritionally balanced at ~50% carbohydrates, ~25% fats and ~25% protein.
Just as you need extra water when hiking in summer, extra amounts of liquids during winter activities are essential. In summer it is essential to take plenty of water when hiking - and ALWAYS in 2 containers. Even with a large platypus or nalgene bottle that you think will be more than enough water, a second bottle is advisable - what if the large one develops a leak? In winter warm drinks and soups should be fixed several times a day.
When Scouts are planning their meals sometimes they will want to go with junk food. Scouts should be encouraged to think about the benefits of a nutritionally balanced menu plan for a weekend, and how much more fun they can have if they eat sensible meals. It's okay to throw in some fun stuff, but it's important that they get the right mix of foods in their diets.