Rumer has it that campfires repel / deter mosquitos, flies and other flying insects. Is there any truth in this theory?

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@Phil - Yes, the smoke does help a little bit in keep flying insects away.  But, it's also not too comfortable for those sitting around and breathing the smoke in.  A hot fire that has little smoke, and that small amount going straight up, doesn't do much for insects.
A bug net or applied repellent is a much better solution.

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