I spent a weekend there in the early 1990's for an LCC cooking class finale.  There were no resident caretakers at the time so we were able to explore the whole house, including the infamous attic.

No apparitions, but one strange experience.  Upon entering one of the bedrooms there was an overwhelming scent of perfume... very strong.  Except, none of the women in the class could smell it.  Not one.  All of the men could.  Several of the women said they never wore scents of any kind so it is unlikely they were "noseblind."  Curious.

Also had an interesting experience when my 9th grade biology class visited... but I will save that for another Halloween...  :)