We ended up climbing on Jan 3rd, so here's an update if anyone is interested.
The road to the trailhead was very icy and I put chains on my front wheel drive after seeing a few people slip... We started at 4am and followed a well beaten fast snowshoe track for the first 4 miles or so. Once we reached the weather station however, the snow was incredible deep and we postholed continually to the summit. The last grueling mile took us almost 4 hours in crampons.... The view of the rest of the Cascade volcanoes was worth the extra effort though on this crisp winter day. Prepare for cold winds and a 12 hour climb!