Do some research, see if it's worth it for your family. We always go, because xmas in MK. In the past you have been able to enter the park at 4pm with your party ticket, and I usually make dining res. for about 4:15 to 4:30 to give us time to get there after entering the park. We also like the special merchandise sold at the party - we all get a t-shirt for sure. Then there is the "snow" on Main Street, the special parade, the xmas stage show, and special fireworks. There is usually some kind of dance party with a DJ and characters roaming around, free cocoa and cookies (not our thing, but you can ask for sugar free options), and lots of decorations. In the past they even did a special xmas theme on Jungle Cruise, making it "Jingle Cruise". And if you enjoy character meets, check and see who will be there during the party and make a plan for the evening. A lot of this offered for free right before xmas, but the crowds will be bigger.