My first year was 1997 and was there again in 1998. I was probably far too young to be there but begged my family to take me whilst we were in Florida anyway.
I remember the museum of horrors in 1997 as it was before IPs were really a thing and I'm pretty sure they had Ghostface, Poltergeist scene, Exorcist, Candyman and others. I was freaking out a lot after it in 1997 that one of the scareactors came over and broke character to tell me the blood was just corn syrup. Moral of the story is don't take your scaredy cat kids to HHN even if they think they are brave. I've been going when I can ever since though so I guess I enjoyed it deep down...