Trail mix has been a food staple among campers and hikers for decades. It's no surprise why -- quite simply, it's a high-protein, high-energy, super convenient snack. Most off-the-shelf trail mixes contain peanuts, which should not be taken on the plane, but you can make your own peanut-free version. And that means you can put as many chocolate chips in it as you want. The pre-packaged versions can be high in salt, sugar and preservatives -- yet another reason to mix up your own.
The do-it-yourself approach also has the advantage of potentially being cheaper, and you can experiment in the kitchen until you find the perfect recipe. All you need to get started is a giant bowl, some airtight storage containers and a variety of ingredients such as raisins, craisins, banana chips, sunflower and/or pumpkin seeds, granola, and of course, chocolate chips. The possibilities are almost endless.