Yes, dressing up is for everyone, young and old alike. Now, be comfortable, but be cute! Even halloween t-shirts or any of the character t-shirts from The Nightmare Before Christmas (they have lots of those in the parks and on disneyshopping.com) to get into the spirit really makes a big difference in how much fun you will have. My DH NEVER dresses up and he has gone as Prince Charming and as the cutest pirate you will ever see, and he had a blast! The CM’s are so complimentary and make you feel like you might feel out of place if you hadn’t dressed up!
Some of my favorite rides for the party included Pirates of the Carribean and Space Mountain…but SM will be closed when we are there for the party this year…our first year the CMs at SM let us go thru the back way from the end of the ride to the area where the line splits in two to get back on…they said because we were all dressed up and in the spirit…LOL.
The characters are great during this party, the dance parties, especially for the little ones are a must, and of course, you may like the parade so much the first time that you want to see it the second time around. Best viewing areas: right in front of the castle stage! and at the square right inside the gates (if you can wait that long to see it!!!)