I am hoping they release the dates soon as well. We managed to get to the last P&PP on June 4. We had the best time! My DD loved collecting loot around the park, they just did plastic gems and beads this time, no candy. The parade was AMAZING, I would have loved to have seen the fireworks but we were having a very special experience in the judge's tent in Toontown, we were in line to see Minnie dressed as a princess and found ourselves in the room alone with Minnie, Dopey, 2 photopass photographers, and a character handler. My DD was having way too much fun in there with Minnie and Dopey to worry about the fireworks, I did see the last one where they go all around the park.
We LOVE all the parties, we've done the Halloween Party, Christmas Party and were very excited to find out we would be able to do the P&PP.
My DD is 4 and loved it. We also make a point of doing the things that are only available at the party. We can come back and ride the rides another time, but we made sure to hit all the treasure spots, meet all the characters, like Captain Jack, who are only out during the party, and enjoy the special shows and parades, if we manage to do all of that and ride a few rides then that's all the more bonus.