Bring your own. Most do not have a ring, and I wouldn't use the ones that are there.
I would suggest you bring your own. Some of them fire rings are pretty bad.
We always make due with the fire pit ring grates. Some of them are pretty beat up and should probably be replaced, but most of the time a good scraping and brushing and they are good to go.
Each cabin has a ring firepit with a grill over it. But i would recommend bringing your own grill.
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