I am wanting to make up a "daily ration pack" for a school outing (wild camping) and need ideas guidance as to what can/need/is good for a 14/15 year old for a days food.
Why not have em' split up into patrols and be in charge of their own food? It sounds like your group isn't necessarily Boy Scouts but you can easily teach these guys the patrol/team/crew method and have them use it. If there is limited money, have em' do something like a car wash/bake sale to raise some easy cash.
The best way to make the boys happy with the food is to put them in charge of it. Make them do the planning/fund raising, and make them do the cooking! All the adults should have to do is supervise, not necessarily be in control, esp. if you have older, responsible boys who can take on a leadership role in this.
just my 2 cents :)