Drove up to Beaer Brook to check it out:

It is plowed.

There is a large sign at the entrance to the trails indicating that hikers should follow the marked trail to the road - 1/2 mile - then follow the road to the regular trailheads.

There is no indication regarding overnight parking for hikers - the normal sign at the entrance indicating that the area is closed from 10 PM to 6 AM is still posted.