I’m flying in August from Anchorage to Kotzebue for 6 days from where we want to take a couple of overnight backpacking treks in Kobuk Valley National Park. I would like to buy vegetables and fruits in Anchorage and take them on a plane. I don’t think packing meat and fish is realistic. Would like suggestions how to pack these items. Is cardboard box a good idea? I guess I cannot seal it but who will after the inspection? Thank you for ideas.