WCAX just posted a very interesting update on their progress, which answers some of my previously posted questions
(link).
The temporary antenna is being mounted on an adjacent tower on Mount Mansfield that is currently used by the FOX and ABC affiliates. It is expected to provide coverage to "most of the same geography" as the old antenna. Shooting from the hip, I give myself 50% odds of of receiving the temporary signal. Depending on the weather, it looks like the temporary antenna will be up in a week or less. It will be used over the winter months while work on the main antenna system is impossible due to weather conditions.
As an outsider looking in, this has been a very interesting story to watch develop and very educational in terms of the various engineering details associated with bringing these pictures to our screens via OTA.