Hobo packets are really fun and easy:
http://www.domesticgeekgirl.com/food...re-hobo-packs/ We always chop up an assortment of veggies and then everyone makes their own and adds their own seasoning.
We've made chili on our camp stove too which is great if you're somewhere it gets chilly at night.
We also like to use the Ghiradelli chocolate squares for s'mores. They're the perfect size, melt great (unlike Hershey bars) and you can even get flavored ones to mix it up. The mint one is my fave.