Leora:
We are looking a doing Sunshine route this weekend. Saw your previous post and had the same question: Was the road open only to the gate at Cooper Spur (at around 1050ft) or was it open all the way to the Tilly Jane trailhead (at around 3800ft)?
I just called the ranger station and they said 'no', but it looks like 'yes' from your trip report. I'm hoping for the latter.
Thanks,
Bill D.