We are planning to stay just 2 nights in Oct and only do the MNSSHP. Looking at 10/1-3 and the 10/2 party. My youngest turns 3 on 10/2. Seems like I remember that if we were doing a package, he would be considered 2 for the duration of the trip. But does he need a ticket for the Halloween party on his bday since it's a hard ticket?