If you feel like doing some cooking, empanadas are great picnic food. I actually made some for a picnic we had last night with frozen pie crust and leftover veggie/beef sloppy joe mix. Filling options are endless and they're a hit with my kids. There are also plenty of places that sell them ready made.

1 - cold pasta salad with veggies, chicken/ham and cubed cheese
2 - hot dogs (they stay pretty warm wrapped in foil)
3 - meatball subs or even just meatballs with toothpicks
4 - pizza

I'd also cut up a huge tub of all sorts of raw veggies and watermelon bring them as sides each night.

A big container of cut up fruit. Cheese and crackers of some sort. Cut up veggie crudites and hummus.

pizza delivered to the field (e.g, Papa John's or similar). Thermos of lemonade.

fried chicken and sides.

-Tortillas (made into wraps with whatever fixings you like).
-Cheese, deli meats, crackers or crusty bread, fruit & vegetables with dip.
-Pasta salad, fruit or vegetable side, crusty bread.

You can really make anything since whatever you choose will not need to keep all day. If stored properly, it would probably even be warm when you get to your destination.

We have a summer sport clinic for our oldest child and to make it work we will need to go directly from camp to the event.

We are planning on having a picnic there for the kids for dinner. Any ideas on 4 nights for picnics. They are are camp each day and have sandwiches each day.