We've been the last two years and it's fantastic. First year DD dressed up as a 50s diner style waitress, courtesy of
WalMart ($15 - dress, petticoats, hat and pinny - amazing value); DH went as a ghoul by using face make up (it was horrible - all the CMs thought he looked great

). I didn't want to dress up but when we got in the parks I bought a neon-pink flashing set of fluffy Mickey head bands - it was hilarious at first in POC with pink flashing lighting, until I realised it was me and turned them off
Last year DD went as Cleopatra (another WalMart fantastic costume at $20), DH was one of the many ER doctors (but he looked the best

) and I was going to go as a greek goddess, but I was being pushed around in a wheelchair due to broken toes and the dress was a bit revealing up the top . . . so I was very boring again and bought this brilliant Halloween batty t-shirt which I wore, with matching earrings and trick or treat bag.
Many people don't dress up - it's not an issue. I think there were definitely more people dressed up last year, though, I reckon about 50% dressed up.
Get one of the free photos done, we did it right at the end of the evening when they were closing as all the lines were gone by then.
We entered early, about 5pm, and were asked to congregate over in Tomorrowland. So we got to ride Space Mountain with no queues - and all the other rides over there.
Last year was definitely much busier than 2002, but it's still a lot more manageable than doing MK during the day for us.
We were staying at the Poly so it was cool to ride the monorail with other people going for
MNSSHP, there's a kind of camerarderie if you're dressed for it.
It's a great evening
