My last 2 day trip:
Fruit: berries and plums which are now in season
Vegetables: Greens, carrots, cucumbers, tomatoes and olive oil and vinegar
Packet of hummus and pita bread (tortillas are great also)
Nuts: Walnuts (but not too many)
Cereal: Organic and whole wheat granola with an almond milk
Rice & Bean packet from Trader Joe's (emergency food)
Peanut Butter Packet to go with pita bread
Results:
Hungry a bit, but did okay. probably need to add a booster food like a green powder mix.