My snacks for the road are mainly two things - macadamia nuts and Dukes jerky.

I love Dukes "Shorty" Smoked Sausages and Jerky. The little links are not hard and tough, they're easy to chew. High protein/low carb, clean ingredients, very portable because they're dried.

Most stores carry them in my area including Walmart & Target: https://dukesmeats.com/