Correct, tundra and glacial are different caves IIRC with the latter being higher level Yetis. I don't think there is a very safe place to med and AFK around there for longer than a few minutes. Pathing mobs outside the cave and a pathing yeti inside the cave that wanders the entirety of the main tunnel. You might be able to check out the outdoor pathers and determine if there is a safe spot around there where you could sit that no aggro overlaps.
The lower level yeti cave I believe there are one or two spots, as well as the zone wall outside the cave, to med/AFK at.
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