If you'll have a cooler, I've taken tuna salad and/or egg salad pre-mixed in a bowl along with a bread to made sandwiches in the park to avoid the sogginess factor. You can buy tuna in the pouch and also already hard-cooked eggs to make this up pretty easily. It's a nice change from PB&J. Also, you can bring along a deli salad (like potato/macaroni/pasta/coleslaw) in a cooler to share. When I was with family, we brought one big bag of chips for all of us to share. Individual cups of fruit or applesauce are easy to pack and don't need to stay cold.
I love the fried chicken idea! I've done that at a country music festival where we took a midbreak day to have cold chicken, salads, fruit. I also love cold pizza, so if you bought a pizza the night before, I'd be a happy camper the next day. On picnics, I usually take some cubes of cheese, some hummus, pepperoni, crackers and make a snack fest. You could do something like that and have less expensive "lunchables".
