You can also "seed" the parking lot with a few employee cars. One thing I have only seen at one haunted house is an"open sign" It seems the popularity of those neon signs have the general public trained. Even if there are signs about the event, even a big log it needs to be declared Open. If they don't see one they don't know what to do unless they see others doing it? Like at 10 PM especially, they are probably closed. Too bad we missed it.
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.