Excellent coloring. How tall are you before the costume? Do you have stilts or buckets on your feet to make you that tall in the costume?
I was gonna guess/suggest maybe attaching the body suit mesh to the back of the head and tying the hair there. (I dunno man, wookiees look hard!)
Cool pictures. cool I´m glad, you like the mask.
I tied the hair in on the backside. You can also glue them on with silicone if you want, but in the middle of the back that hair should be more stable, so that you don´t have to worry, they will fall out when you open and close the buttons.