Bell peppers are great for a snack. They are very healthy, you can get all the colors to get different nutrients, and, they can curb cravings, too. Raspberries are supposedly good for allergies, I eat them daily. Blueberries, strawberries, blackberries. They're all very healthy for you, don't take up much room, and, have a lot less sugar than other fruits. And, almonds are fantastic snacks! Enjoy the trip, sounds like a blast!