No. You can't take inside the caverns.
No, they remind you before you go in that you cannot take anything other than water into the caves. Aside from that, there is a concession stand that sells munchies and an outdoor/indoor area in which to munch out.
Yes, there is a picnic area and they sell food as well . It's not allowed to be in the cave as it is a natural cave.
There is a picnic area but you can't take food or drink inside the cavern
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