I would think in terms of a gourmet picnic for inspiration. I mean - you can pack anything if it's precooked and good to eat cold. Some things not yet mentioned: How about grilled marinated chicken? Summer sausage, fancy cheeses and pita chips or crackers? Fruit salad? Cold pizza (a lot of people love this!)? Olives, hummus, chopped veggies, dips, etc. Cucumber and tomato salad. Wraps and stuff to stick in them?

You could go to your local gourmet food store and browse their prepared food cases for ideas.

I would bet that not wanting to eat is probably easily solved by packing some foods that you love and that you'll look forward to eating!

I'm typically a backpacker when I'm camping, so the luxury of a cooler and no weight requirement is making me drool with jealousy! Get creative!