You won't have a hard time finding someone to talk with in French up in the ravine.
The ravine is open year-round, the trails that close are trails that would've let you SKI from HoJo (the shelter abot 1/2mile from the ravine) to Pinkham (the trail head)
Other trails that close are winter routes up to the summit. Don't worry, the ravine will be accessable.
As for skiing: Don't count on much terrain. I've never been this late. There should be something, but call Pinkham to find out:
603-466-2725 (pinkham notch)