Well i'm also pretty new to UL, but....
ditch one camera, one compass, or ditch both compasses since you're als carying a gps, ditch one knive, one light, one whistle, one or two hats, ditch the personal hygene kit: you'll survive not brushing your teeth for a day, maybe ditch one of your five watercontainers, ditch the pillow, sit pad.
I should state that i have no, 0.0 experience in snow camping.
But to me it looks like your carrying a lot of stuff double.
Good luck and happy trails on your 8 hour peak-bag hike.