For our troop, a balanced camping meal is a meal that includes everything from the classic four food groups:

1. Meats, poultry, fish, dry beans and peas, eggs, and nuts;
2. Dairy products, such as milk, cheese, and yogurt;
3. Grains
4. Fruits and vegetables.

It's not necessary to include them in equal proportions.

So for example:

• Hamburgers (meat) + bun (grain) + lettuce/tomato/baby carrots (vegetable) + real cheese slice (dairy).
• Eggs (eggs) + tortillas (grains) + sausage (meats) + milk (dairy) + orange juice (fruit) 

Sources:

• http://www.jewishveg.com/schwartz/ffgroups.html