Some good snacks I like to bring on road trips are grapes, blueberries, carrots, string cheese, beef jerky and some chips.
I also like to bring some candy bars as well as some popcorn and Bananas.
Besides those snacks I make some sandwiches at home and then place some in the ice chest in the back of my truck and keep a few sandwiches at the ready inside my truck should I start feeling hungry when traveling down the road.
Potted Meat and those little canned sausages are also great for snacking on and keeping you feeling full when on a road trip and there's not much else to do to prepare them.
Strawberries are also another good fruit snack or some oatmeal bars.