What is MNSSHP? It's been mentioned in a few different posts for October. I know of the food and wine festival in Epcot, but not sure what this is. Thanks!
MNSSHP stands for Mickey's Not So Scary Halloween Party. It is a hard ticket event at the Magic Kingdom. The Park closes early certain nights in the month of October and is open to those that buy the special party ticket.
There's a lot of information about it over on the theme park and attractions board if you are interested. You might want to check that out. I am certain the moderators will be moving this thread over there!
Actually you could go if you wanted. The dates of the party during your stay are October 11, 13 and 16. There is a sticky thread on this over on the theme park board.