I think the sandwiches are a good idea, although I've found alot of people don't care for rye I'd use a good multi-grain or wheat. Also fruit no apples as it sticks in their teeth chips, nuts, etc. Simple and easy to eat seems to work best. For the guys, we do something like build your own hogies or something substantial. They are always hungry and alot less concerned w/ apperances. If you are also providing beverages add alot of water so that they will stay hydrated and stay away from the caffine drinks.