There is no fast way. You either wait 3-4 hours by getting in queue before the party begins or you wait 4+ hours by getting in queue during the party. 
I have also heard it is least of a hassle to get your wristband by coming in through the gates but I’ve never done it any other way so I can’t speak to it personally
My friends met them at the 9/4 party and got in line around 9pm. They said it was posted 75 mins but they were out in 45, so they probably benefited from people watching the first parade
The best advice I have heard for all characters is to go during shows. I’m trying to see the first parade so I can do M&G during the second!