The Wishes Cruise is much easier to get. I called Sept 10th for an Illuminations Cruise. The Illuminations cruises were gone, but I was offered a Wishes Cruise. I turned it down and called again the next day for the Illuminations Cruise. I got the Illuminations Cruise for Dec 10th and out of curiosity asked about a Wishes Cruise. I was again offered one, but decided to turn it down. You can get a good view of Wishes from just about anywhere in MK and to me Wishes is one of those shows that needs to be viewed from near the castle with alot of people around you. It is much more difficult to get a really good view of Illuminations.
I have a couple of extra seats on our Illuminnations Cruise by the way if anyone is interested.