Book them the same way you book an illuminations cruise. Book the 8 p.m. MK specialty cruise. After that, specify your pick-up resort. Pick-up can be at any one of the 7 seas lagoon resorts. They are a little easier to get (mainly because you don't know when MK will be having Fantasy in the Sky - Saturday may be your safest bet), but they also book up pretty quickly. I would call exactly 90 days out at 7 a.m. EST. If there won't be a showing of FiTS on that night, you can easily cancel.