Don't eat potato chips and trail mix as on-the-bike food. They (or at least the chips) are fattening, and your blood is being diverted to your stomach to digest the food. Not cool.
If you need energy and sodium, drink a dedicated performance/recovery drink, maybe supplemented with nutrition bars that are designed to be easy to digest. I just got back from a 62-miler fueled by nothing but a big bowl of cereal two hours before takoff, and LOTS of sports drink containing carbs, protein, and electrolytes. Works a lot better than "snack foods", believe me, as it lets your body give more blood to the legs and brain/nervous system.