I heard there were a couple of Fredericton-area train videos on YouTube. Here they are!
This one was a military train near Fredericton. According to the video comments, it was near Stanley. The power was a pair of M420s, one of which was 3521.
The second video shows a coal train, reportedly the last one in Fredericton, with 3553 as the power. There are about a dozen CBNS hoppers. You can hear the old rails creak as the engine rolls over them.