I know Betsy doesn't like to have sites posted, but there are so many items on these sites, I'd have to type for a month. Here are two well known boy scout sites:
http://www.bsa.scouting.org/
http://www.macscouter.com
These have camping cookbooks on them, plus a hundred variations on the foil pack dinners you could use. Enjoy. I'm both a cub scout leader and a girl scout leader, so I like to pass on help to fellow leaders! Goodness knows, we need all the help we can get!