My DD (age 16) and I go to WDW every August, but are going back Dec. 30-Jan5. Heard MK is way crowded, so is MGM or Epcot better with a 16 year old? I am worried that there won't be much for her to do at Epcot. Are the attractions open in MGM until Sorcers? or is it just wait for the show after 9 pm? Thanks. I have lurked for a while, and have decided to comitt.