#1. "RE: Photographing people in the snow with fill-flash" In response to In response to 0
I think I'd use manual exposure on the camera, find and set the proper exposure for the ice, then - using TTL mode - place the center of the frame on the person's face you are shooting and use FV Lock to set the proper flash exposure on their face. Then I'd reframe, focus and shoot.
Was that all just a bunch of greek to you or did you follow most of it?