One thing to note - they probably aren't starting any fires, so that is one less thing they have to keep warm at night and mosquitoes at bay. My guess is they are sticking to marshlands and moving during the rain so their footprints don't last. I'm not sure what the end game here is, but their energy is probably pretty low with lack of sleep and debilitating environment. I suspect they'll be found either dead or emaciated. Dead is more likely.
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