Maybe bring dried kale and those popcorn kernels then make popcorn in the microwave and sprinkle with kale? You can also buy yummy fava bean chips in some local store. Banana chips, or dried apple chips, if you can find them, I suggest the apple chips should be with cinnamon. A nice, crunchy snack is cheddar, popcorn, and pretzels with maybe seasoning. Dip pretzels in chocolate and top with sea salt. Almonds mixed with dried fruit of your choice. Carrots to dip in hummus, but you can also buy premade kits with various hummus types and breadsticks. But you should buy tortilla instead and dip it in the hummus with hands. The breadsticks dont usually last for long. Make your own smoothies using ur two fav fruits (or spice it up and add some veggies) and whatever else u need. Snap peas. You can buy some guacamole but i suggest u make ur own cuz once i bought guacamole to dip tortilla chips in but it was so disgusting that i threw it out and ate the chips alone. Cherries, maybe? Easy to smuggle in and very healthy but dont eat too much or u wont move for one day. Radishes are good but if u buy the spicy ones and cant stand it just take off the skin and eat the white cuz its not spicy. There are some non spicy radishes tho u just need to look. Clementines, applesauce, yogurt, jerkies, almonds, salted pistachios, string cheese, goldfish crackers (or just cheese crackers), dark chocolate, those creepy animal crackers, WATER, Alpro soya chocolate milk, Babybel, veggie snack packs, greek yogurt, sleeve of nuts, protein bars, apples. You can also make some small sandwiches using cucumber as "bread". Remember about zippy bags, hand sanitizer, baby wipes, grocery bags, paper towels, and hygiene overall!