Fear Farm was pretty good. There are 5 separate haunts to go through which breaks down to about $5 a piece. Not a bad deal. The houses are all themed differently and are pretty well done.
My biggest issue with Fear Farm was the "Club Dead" teen pop blaring at full volume. It really took away from the feel of the haunted houses.
We went on a Sunday and the crowds weren't to bad but I've heard it gets really packed on Saturday nights...