little late to the party (guessing OP's boy is well past Webelos age lol!), but I love foil packs. When camping with a large group, we'd have tupperware containers full of all the stuff pre-sliced- chicken, sausage, or hamburger, peppers, onions, potatoes, celery, carrots, corn and various seasonings ( basically anything you'd put in a beef stew) and let people make thier own.
CHili is real easy to make if you've pre-cooked the meat.
The troop also did a 'soup pot'- each boy brought a can of soup, and cream soups went in one pot, water based in another, and what came out tasted pretty good!
You can put anything in foil and on the coals, you can also boil ziploc bags! The boys loved making omlets- mix whatever you'd put in an omlet in a ziploc, then boil it!
(love the other ideas, too- I'm always open for something new to try while camping!)