I wish I had attended more, but still feel very lucky to have attended two.
I would say All Nite DIE-In/Silver Screams houses are obsolete now, but it might soon be illegal because of the massive rights limitations and much more attention on the event than in those years. If they tried "unofficially" using Ghostface and Pinhead now, you can bet your bottom dollar that word would get out and they would be sued.