I agree, if you CAN go another week, do that. But if that's the only one that works for you, have fun! We went Easter week and it was extremely crowded, but we had a great time. We just kept our expectations low for number of rides you may get on. One day it was so crazy at MK we couldn't take it, so we left for a couple of hours and rode a watermouse at Poly, then had lunch at GF. After that we were ready to head back and enjoy the fireworks and SpectroMagic. Have FUN!
(I have also been there for New Year's Eve, and what a crowd!! But it was so much fun that I will go back again.)
Lori