There are 100's of options. Green Woodlands Foundation in NH is slightly out of the way, and the wrong way, but really special and nearly 100% machine built flow. I hope you have time to do a hike or two up there too. Holderness is wonderful. Rattlesnake Ridge has great views and isn't a big commitment. Ride wise, Ramblin' Vewe Farm is close by and pretty fun but not destination riding, just good ole' New England chunder. You may also have snow on the ground depending on where you decide to ride. They're getting 3-5 tomorrow and it looks cold enough to stick around/cause freeze thaw issues.
I really like Holyoke in MA and have used it as an on the way spot when headed to NH. The Batchelor Street side is my fav, but likely too rocky for your liking. You might like the Earl's side, it has some flow. It is really close to 91/Northampton and far enough up that you wont be driving too long after riding.
https://www.nemba.org/chapters/pvnemba https://www.facebook.com/groups/pvnemba/
Conn. has a lot of options too, as does NY depending on the route you take. Happy travels!