The plot is very similar to a 1953 Disney short, Rugged Bear (1953). Both shorts were written by the same person, David Detiege.
The last cartoon of Elmer Fudd until Box-Office Bunny (1990). However, he also made a cameo appearance in Crows' Feat (1962).
The final Elmer Fudd cartoon directed by Robert McKimson.
The title is a twist on the game show 'What's My Line?' in which a panel of celebrities attempts to figure out a contestant's occupation by asking questions that can only be answered by 'yes' or 'no'. Each celebrity has an opportunity to ask as many questions as they can, as long as the contestant can answer 'yes'. If the celebrity asks a question that is answered 'no', the contestant had 5 dollars added to their total, and questioning would go to the next celebrity. The contestant would continue to answer questions until either a celebrity guessed the person's occupation, or ten 'no' answers occurred (for a total of $50 - for the 1950s a pretty good payout for a few minutes time). Since this was a TV game show, there was also a time factor that could enter in and, if the celebrities were still stumped, the contestant would win the full $50.
The opening panorama appears to include scenes of California's Yosemite Valley, which is far from the Rocky Mountains. The Rockies are further east and traverse both the US and Canada, though not California, which is home to the Sierra Nevada range.