this is my first time to visit WDW during Halloween! Has anyone done the MNSSHP? If so, did you take kids? I'm taking 2 of my Granddaughters (ages 12 & 10). Would they think this was "Really Lame Nana" or "OMG Nana, you are SO AWESOMELY COOL!!" I know there's an extra charge, so does Disney close Magic Kingdom for this event?