Weve done both and enjoyed them equally. I prefer the Wishes fireworks, but the view of the Illuminations was specatular! If you do Wishes, then you get a tour of both lakes afterwards. You see the Wilderness Lodge lit up (it is designed to look like a bear with the lighted windows shaped just right!) and round past the old Discovery Island.
Definately take blankets! We did Wishes last December and it was so cold, I swear there were ice bergs out on that lake!
Even when we did Illuminations in June, it still got a little nippy coming back.
Either one, you will have a great night out!
Allie
PS..when we did Wishes, only SOME of the boats had the music piped in. CM said they were working on it for all the boats, but it is not guaranteed. Fortunately, they all "park" quite close during the show and you can hear the music from the boats that DO have it!