I was there Tuesday. -9 at the summit and windy. Fun, fun, fun! I was the only Tesla plugged in, and got the full 80A. There were 2 Volts and a plug-in Pacifica at the J1772's.
If coming up 89 from the south, I'd consider ignoring the nav's routing of exit 5/64/12A and go to exit 9 and take 100B/100. It's only 10 minutes/15 mile longer, and takes you by the Berlin Supercharger at exit 7.
The direct route via 64/12A through Roxbury can be "challenging" - 1700 feet of elevation change up and over the mountain on Roxbury Mountain Rd (but the view of the valley from the summit is beautiful). Much of the route is unpaved. Sections were pretty rutted up and I had to go well under the speed limit. 100B/100 may have been faster. A friend in a rental SUV with all-seasons was sliding all over the place. I was OK with RWD and snows, but I didn't want to stop for fear of losing my momentum and not being able to get going again.
View attachment 379646 View attachment 379647