Cant beat peanut butter and meatballs! LOL.....It's vacation so I would offer unlimited snacks, Tortilla wraps and lunch meat are a great grab and go item, make a crap ton of mac and cheese the little ones can even reheat that easily, although with 5 kids you probably plow though pot meals LOL You can also make a lot of grab and go/ re-heatable foods in muffin pans like mini omelets, muffin pan tacos using wonton wrappers (if you can get them).