How long is the wait generally? I have been to some haunted houses with a VIP line that takes over an hour to get in. Is this a very long wait or is it generally a quicker line?

Generally quicker than that... plus they have covers over the lines incase of rain... we just went last night around 1015 ... the wait was maybe 30 minutes at most for the house and 15 or less for the dark hall... and this was there opening weekend.... they open at 8 so they are busier from 8 to 930 or 10... we ended up parking on the side of the road, juat across the street

Its actually pretty rapid, with covered entrance waiting.

I went opening night right when they opened and waited about 45 minutes, but I've waited an hour in the past. It is SO SO worth it. It's covered like the above comment says and it goes pretty quick. Well worth the wait!