You are correct, again.
Being cool without any obvious effort, without seeming to try, as if cool, was simply what you are.
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Keep being right in this offhand way. :)
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Reel - from fishing and such, where you have a line that goes out & is collected back in, onto a reel.
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It is saying that something is too much, too far, too big.
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Something one said, or their attitide is being commented on. They are being told to back off, suggest less, accuse less, whatever the conversation is about.. Basically, a statement that thei attitude should be controlled and less aggressive.
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The "few hundred miles" is just suggestion that they are by a long way excessive.