While road tripping is always a good time, finding suitable snacks while traveling can be a chore. All that processed food can make your time behind the wheel lead to a little weight gain. One simple way to avoid an expansion of your waistline is to pack your own snacks when you hit the road. Here are eight 150-calorie snack-pack ideas perfect for any long car trip or flight. Just assemble your snack, bag it, and then pack it in your purse or carry-on. Not only will you save some calories, but also, you'll save some dough.