We have been for the last 2 Easters and they have both been very different.
Easter 06 we arrived on Easter Sunday and there were Easter shows with White rabbit, Alice and Mad Hatter taking place. Chocolate eggs were handed out to children at the end. Also there was a giant Easter Egg full of Thumper Rabbits just inside the park.
Easter 07 we arrived Easter Monday and as it was just after the 15th celebrations started there were no special Easter events or decorations.
The park was open late (although it was very busy) but there was no Fantillusion or Fireworks.