Outdoor cooking differs substantially from kitchen-based cooking, the most obvious difference being lack of an easily defined kitchen area. As a result, campers and backpackers have developed a significant body of techniques and specialized equipment for preparing food in outdoors environments. Such techniques have traditionally been associated with nomadic cultures such as the Berbers of North Africa, the Arab Beduins, the Plains Indians and pioneers of North America, and have been carried down to and refined in modern times for use during recreational outdoors pursuits.
Currently, much of the work of maintaining and developing outdoor cooking traditions in Westernized countries is done by the Scouting movement and by wilderness educators such as the National Outdoor Leadership School and Outward Bound, as well as by writers and cooks closely associated with the outdoors community.
The type of food common in outdoors settings is somewhat different compared to household foods, and also differs depending on the type of cooking activity. While someone at a public campground may have easy access to a grocery store and be able to prepare plenty of recipes with fresh meat and vegetables, someone on an extended trip into the backcountry will not be able to carry large amounts of fresh food, due to the extra weight from high water content, and will have to rely heavily on food with a low water content, such dried meats and vegetables, packaged dehydrated camping foods, and starches such as ramen, polenta, and dried potato flakes. Wilderness experts in both categories sometimes make use of locally available wild foods as well, particularly wild vegetables and fruit but also occasionally fresh fish and wild game; however, it is not unusual for camping food, especially backcountry food, to be partially or totally vegetarian.
Camping food is often very high in fat and carbohydrates to provide energy for long hikes, and hikers (much like soldiers) must rely heavily on energy-packed snacks such as trail mix, chocolate, energy bars, and sports drinks. Water can also be at a premium, so important parts of a camper’s pantry include chlorine or iodine-based water disinfectants as well as drink mixes to mask the flavor of the chemical treatment.
Recipes are often designed with significant planning and home preparation in mind, with certain ingredients mixed at home and then cooked on the trail; to that end, there are a number of providers of freeze-dried food, both ingredients and full meals, to the outdoors market, and just-add-water instant meals (including hot cereals, pasta or rice in sauce, and instant soup) from the supermarket are popular as well. Alternatively, some wilderness experts advocate bulk rationing, in which each hiker is given a selection of raw ingredients and prepares a meal from scratch on the trail.
From Wikipedia.