Aww man that's totally hard...I used got2B 2 sexy Voluptuous Volume hairspray...and a lot of hairdrying. My bangs WERE poofed up, but due to the car...and having the windows open the whole time...they went buh bye. Anyway that hairspray holds up REALLY REALLY well. I seriously recommend it.
And yes I'd be going as DW4 Da Qiao also if you pick a day (but not Sunday pleaaase I have a special costume that I'm making for that)