There is mostly grass and dirt, some grave. I have a friend that has brought his low riding sports car and just went slow, no issues.
I agree with Lisa. I have a Chrysler 200s on 22" rims and when I rode down their gravel/dirt drive, I kept a slow and steady pace and was fine. If I'm not mistaken, at the end of the gravel drive you are able to park in a flat grassy field during your visit. I hope that the selection of answers you received helps to clarify your question.
Gravel parking and some grassy areas. Depends on how many people are there.
I drove my old 07 Eclipse there a few years ago, it was a little bumpy but otherwise OK
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