There are some vague or non-exact figures and information on this page. Some spading is required.
June 2015 changes: Namely, check if adventures that once occured in both versions of the cemetary still occur in both the Unquiet and VERY Unquiet Garves
A primary stat of 11 is suggested. If your main stat isn't high enough, you'll see the following message:
As you near the Cemetary, you feel a chill forming in your spine. Then it moves out one of your ribs, down your right arm, and into your pinky. Then it moves back into your spine, down through your pelvis, and into both thighs. Then you run away, because this is just getting weird.
(It is recommended that you have at least 11 <mainstat> to adventure here.)