I would just bring a fork and steak knife for grill tools.. You can then just grab premade burgers, hot dogs, corn on the cob, asparagus, chicken, etc....things that need no prep. Pick up some paper plates, cups, plastic silverware, nonstick spray and a thing of aluminum foil and you are good to go!
For breakfast, you could keep it simple....fruit, bagels and cream cheese.
Have a great time!!!!