they do! There is a place called "Redwood Canopy Tours", I'm not sure if there are others but its a great place, so worth it if you're going
You can go towards Brookings and I have seen one along the way. On 101. None in the Redwoods that I know of.
Not that I seen. Gandolas at trees of mystery.
What they said. ^^
They do, see above comments 😊
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