Let people choose what they want in their foil dinner
Giving everyone their own choice for this meal is part of the reason why it works great for family and group camping.
At the end, if there are leftovers, you can put the remaining ingredients in stand-alone foil dinner packets. These can then be available for people who are still hungry, or the cooked ingredients can be easily used in a breakfast. Cooked potatoes for example make great hash browns or omelet ingredients.
Once each person has chosen their ingredients, put a few slices of butter and some salt into their packet.