Thanks for the replies everyone. Subject to weight restrictions on the flight (and my perpetual lack of funds) I think I'll probably opt for the peli case. As Leif mentions, they are guarenteed to do the job. I've used smaller peli cases to house remote camera traps that I have built, which were frequently left out in my local woods over the winter, and they faired well. I'll have access to an oven whilst in the forest, so this can put to good use drying the silica out!
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