When Archie is skinning a deer he has it hung up by the neck. Normally game is hung by the hind legs and bled from the neck before it is skinned or butchered.
When Grey Owl's publisher Champlin arrives by airplane, to convince Grey Owl to go on tour in England, the airplane shown is clearly a DeHavilland DHC-2 "Beaver" on floats. This scene is set in approximately 1935, but the DeHavilland Beaver did not make its first flight until 1947.