Do they put the Haunted Mansion FastPass machines into use when the attraction is redecorated for the holidays? If so, are those machines on the network with the rest of the park or are they stand-alone like Roger Rabbit?
Sometime around 2004 HM stopped using FP for normal operations but kept it for the holiday version (Haunted Mansion Holiday - HMH). FP for HMH was disconnected from the FP network a few years ago but the last couple years it has been connected to the network.
In October it wasn't moving very fast! It was quite the long wait actually. We were there with my brother, who is in a wheel chair. Even then we would have a wait, but not nearly as bad as stand by! I'd use the FP!