I could write volumes, but I will try to keep it short.
~ put together a basket or box of stuff to keep the kids occupied if it rains, handheld games, puzzle books - whatever will keep them from fighting if the weather gets nasty.
~ hobo pie irons - seriously - everyone can prepare their own meal - and if they burn it - they eat it or make more. Don't get stuck doing chores - cooking and cleaning for your family. Let them share in the prep and cooking and clean-up
~ small wisk broom and dustpan - the tent can get pretty messy if you don't have everyone take off their shoes at the door. Even then, a small broom helps a lot.
~ two way radios. Let the kids explore, but using those inexpensive little radios gives you piece of mind that they are OK and not in any real danger
~ bug spray - gallons of it
~battery powered lanterns or several flashlights. Everyone needs to be able to "go" if needed. Individual lights are really helpful
Have fun! I have so many memories of camping with the boys - and my cub scout troops