I recently posted this in another thread regarding MNSSHP, so here it is again...
MNSSHP consists of special events such as:
A Halloween parade(Boo To You), characters are dressed up in costumes...the parade was great!
Different version of Wishes fireworks...called Hallowishes.
When you enter the Magic Kingdom, you'll be given a trick-or-treat bag and you go trick-or-treating throughout the park at 'X' marked locations, chocolates, candy is given out.
At the park entrance, it is smokey, eery atmosphere(but not so scary!) with Halloween decor...all done in a Disney Fashion of course.
The park itself has Halloween decor throughout...very cool. Take plenty pics.
You'll notice plenty of kids and also adults dressed up in costumes!
There is a show in front of the castle, but unfortunatly, I missed it.
And of course the park is open for extra magic hours which is at least midnight.
Hope this helped...If you have any other questions, feel free to ask.
You should definetly go...you'll have a fun time!