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I stayed in Gardiner Montana for just a night during a trip to Yellowstone in 2010 (see the Wyoming page for details of Yellowstone NP).

Other People's Trip Reports
North West 2010: Montana, Idaho, Wyoming and Washington : John Fox, 13 days, 4400 miles and 34 mammals including a Long-tailed Weasel and hearing a Pygmy Rabbit.

Pacific Northwest 2006: Mark Hows, 2 weeks & 27 species of mammals including a Marten.