There were two RCAF training stations in Western Prince Edward Island during WWII- one at Mount Pleasant and the other near Tignish.
Here's an image of a Wellington aircraft...
Image cf. http://en.wikipedia.org/wiki/File:Vickers_Wellington.jpg
Bob Gordon recalls the incident well - he was a young boy. He said the plane hit a block of sheep huddled together in the field as the plane approached - all the sheep were killed. Bob also remembers the pilot letting them sit in the plane.