@dmcmorrow Thanks for your patience as we tracked down some more information.
Our REI experiences team in New England uses the Weston Ski Track as the primary location for teaching Cross Country Skiing. We are planning to start running programs there in January. While we do occasionally organize private sessions at unique locations for many of our other activities, that proves very challenging to do with snow programming due to unreliable conditions in the winter. One of the reasons Weston Ski Track works so well for ski programs is because they produce their own snow. One group that you may want to reach out to is the Western Massachusetts Cross Country Ski Area Association, who may have some helpful advice for you as well.
Hopefully this helps, thanks!