Your cabin is easiest to reach by car. No wheels? Here are the public transportation options:
DC
Hop the Amtrak to Charlottesville and take Greene County Transit (weekdays only) or a taxi.
BOSTON
Hop the Concord Coach to Concord and call a taxi.
NEW YORK
Take the Amtrak to the Hudson station, then take a 20 minute taxi or Uber from there.