Well if there aren't enough resources to deliver ammo AND food and I was being mortared/shot at, then know which one I would rather have (hint... NOT FOOD!).
A booty friend of mine has just returned from SF duties in Afghanistan and had nothing but praise for the Chinook and Harrier guys - it took me back somewhat as I was expecting a stream of verbal abuse and banter to the contrary! Make of that what you will, but I know which source I would rely on.