How crowded is the Castle Lighting on a party day?

[Gentry2004]

Thinking about watching a Frozen Holiday wish before leaving Magic Kingdom on a party day. Is it just as mobbed as the nighttime fireworks? If so, I'm thinking we may not want to stay...

 

[chiburple]

We saw it on a party day. There were lots of people. I've never felt uncomfortable viewing the fireworks and I felt this experience was about the same in terms of crowd comfort. Our Party day was sold out if that makes a difference.