Make it run smoothly
A few logistics that help.
Assign dad/daughter helper pairs for cooking and clean-up at each meal — it spreads the load and gets the girls involved. Set up a simple "dish station" with a 5-gallon bucket, dish soap, and scrubbers. And bring back-up disposable plates, utensils, and cups for anyone who forgets their own.
Group cooking gear worth having
For feeding a big group, a heavy-duty propane stove, a large wok, a large stock pot, and a Coleman 2-burner cover almost any menu.