I went in 2012 and wow it was very very very busy. The atmosphere was really thriving and the characters were swamped. That was the year with the final Fantillusion to seeing the parade for the last time was nice, also the year for Tiana's Show-boat Jubilee show which was awesome!
So if you don't like crowds and pushing for characters, it's a scary time. But the shows and the night's atmosphere is something worth experiencing! So I say go for it!
Be warned that when I went the night was sold out! I'm glad I got tickets before hand and also being in the park that late was awesome. Not sure what might happen this year but from what I heard about 2013 it was still good!