As a long-time scout leader, I'll throw out these ideas:
- At age six, snack time is a social thing, and snacks are a status item.
Make her snacks good.
- My girls' super-favorites were things to dip. Makes snacks into an activity.
- Our go-to was usually grapes (grapes in two colors when I was really on my game) mixed in with cheese cubes. Totally healthy, no refrigeration, and co-exists in a ziplock together.
- No to chocolate ... or iced cupcakes ... or other things that melt /require extensive hand washing /mess up clothes.
- Include a little note saying you're proud of her and can't wait to hear her camp stories.
- Label everything, especially if you're sending a plain old water bottle that looks like everyone else's.
- Be sure she can open her stuff totally without help; day care leaders have enough to do without pulling back half a dozen fruit cup lids.
We are soooo a Rice Krispie family. We prefer our Krispies made with crunchy peanut butter, and we are strongly against chocolate chips being included in Krispies.
Also, just cubed, hard cheeses like Swiss cheese can also last outside of the fridge for a few hours.
Most cheeses -- cheddar, for example -- doesn't actually NEED refrigeration; it just lasts longer if it's kept in the refrigerator.
I make cheese, and it sits out on the countertop for 5+ days ... it's part of the recipe. Even though I love it, I'm a little weirded out by it.