The last thing you should do is raise your price. I would suggest that you cut the ticket price in half. As everyone knows Halloween is the worst night for a haunt and people will more than likely visit your haunt on Halloween night if they see that the ticket price has been reduced. Some business is better than no business and I feel that you'll get tripple your business if you reduce the price for just one night. Or you could work together with another local haunt by creating a combo ticket for Halloween night that would include both haunts for a reduced price. It would be a Halloween special.