Campfire Starters - stuff toilet paper rolls with dryer lint. You can even roll and wrap in newspaper. Toilet paper rolls and dryer lint are an inexpensive DIY project - in fact free and you are recycling!
Boondockers Foil Cooking, a ton of great camping recipes for Juniors earning their Camper badge. (to make the whole experience girl-led, let the girls choose what they want to cook, make the shopping list and then cook the food.