The Shooting Sportsman magazine in its Sept./Oct. 2007 issue has an article titled "Hunting Trains." On page 159 within that article is a another article titled "Yes, You Still Can." The Royal Canadian Pacific Railway was offering wingshooting trips which were called "Fall Feathers Tours."
Huns and Sharptails were the primary quarry with hunts taking place at various stops in Alberta and Saskatchewan with Calgary the point of departure. Its my understanding that these wingshooting trips are no longer offered even though the Shooting Sportsman article states that the 2007 hunt/trip was booked full, months in advance.