Pretzels, granola bars, fruits/veggies pre-packaged in snack size Ziplocs or containers, nuts, dried fruit/raisins, go-gurt. Ham sandwiches are our family's favorite. And, for last year's trip I tried out some wraps with tortillas. Hard candy has also been good - a bit of sweet but without the mess of chocolate. I do try to pack foods we don't typically have at home so it's a bit of a treat.

That said, we do a lot of road trips and, unfortunately, by day two we're usually tired of what we have packed. I'm not sure what your kids' ages are, but if making healthy choices when you do stop at a gas station or restaurant is important, maybe a Bingo-type game indicating various food choices would be a fun activity 🙂