Like Don I've used uShip.com with success. Plains, MT is reasonably close to I-90 which is a major thoroughfare across the northern part of the US. I would think there would be many drivers with a partial load who would like to pick up some extra money by hauling your Kitten.
In my experience it's best to be able to provide lots of details about the load such as dimensions, weight as well as loading and unloading facilities at the point of departure and destination. Being flexible on dates will also help.
I would recommend you consider carefully the bids as the lowest price is often not the best value. My last experience involved having a small boat shipped from Wisconsin to Utah. It was on a trailer and the accepted price was substantially less than I could have done it for. The driver was conscientious, and his communication was excellent.
Good Luck!