After driving on dirt road and seemingly through private property, there was a parking lot and trail sign towards Harwood hole as well as warnings for those attempting to rappel and go into the hole. I think you go somewhat SE from lot onto trail. Towards the end of the trail there is a split, one takes you to view of hole, the other to an incredible viewpoint (go here after the hole).  Camping allowing in parking lot and port a potty available when I was there.