Looks like I am a little late to be useful, not to mention others gave you the info you needed. I was there 2-3 weekends ago, the Sandwich dome trail was broken, but not heavily, you could still make out individual snowshoe prints. I went up & down that trail rather then descending the brook trail to complete the loop like I have done in the past. That looked broken but only by no more then 2 or three snow shoers, I did not trust it, I did not feel like breaking trail. Getting to Noon peak was fine on that day, but Jennings peak trail was very icy and a bit of a challenge in snow shoes. It takes little imagination to picture the steep approach to Noon peak being quite icy given a few freeze/thaws.
At that time the parking lot was not plowed, I parked about 1 mile down the road (that was the closest pull out I could find). They had plowed enough to allow working vehicles to get to the power station, no more. I think this was the weekend after the Tuesday nor'easter we had in mid March.
When I did this hike last spring (2016) the entire upper mountain above 3500' was ice, so in comparison this trip was "a breeze". How was it yesterday ?