This is a merchandise event. I've gone the last two years with friends and have always had a blast. Mainly because we are huge HM fans and always have a good time together.
Not much is open as far as attractions. HM (of course), Splash, and Big Thunder Mountain (although last year Pirates was open since BTM was not).
There is a gift for each attendee and usually a special dessert and lots of merchadise on which you can spend a fortune.
However you go through a lottery process to purchase the merchandise.
A few of us are giving this one more year. The first year was great. Last year was better in some ways and worse in others (especially the food which was served outside in the dark and you couldn't tell what you were taking).
Cyn