The boat disappears and reappears on the dock.
Every time a night sky with a moon is shown in a scene, the moon is full. Assuming that the vacation was not long enough for a month to pass between these scenes, the moon phase should be different in each scene.
British Columbia is not 'Northern Canada'.
When Mr. Black is in the hospital, a ventilator can be heard, even though he is not connected to one.
When Uncle Kipper is showing Joshua and Ashley the totem pole, the camera is pointed down on the characters. As the camera pans lower, a crew member's foot is visible at the bottom of the screen.
A blue jay can be heard in the movie. Blue jays are not found in Western North America.