I would call the game farm directly. That said; even if you were able to view the game farm via a bus you would miss a key part of the experience. You would not get to experience the one on one interaction with the animals as you feed them from your vehicle window. You haven't lived until you have elk, musk ox or bison slobber on your steering wheel!
Tjey have a tour bus route but check and make sure that it not too big
A very small bus
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