All this "comedic not scary talk" is, I think, ridiculous. The two genres go hand-in-hand. Something that is funny or over the top is a better distraction for a scare and a common response to fear is laughter, folks. More importantly, what haunt and horror fans find cute and hilarious, the general public finds terrifying.
Even Slaughter Sinema, the house everyone suspects to be the "comedy" house, is meant to be realistic, gruesome, and more scary than funny.
Basically, calm down. The event will be fine.