My family: me, husband, daughter (18), and daughter's friend (17), will be visiting December 15-27. By referring to the 2014 December hours, I see it is a possibility that Magic Kingdom will have evening EMH a day or two during our trip. If available and we were to take advantage of this perk, I was wondering how productive it is and what is the best time to arrive. Understandably, we would take a day off from the parks the following day. Is it worth sacrificing a park day in the middle of our trip to take part in evening EMH?