Been to Glacier many times. My assumption is you'll be staying on the east side of Glacier. I always stay at the KOA in St. Mary. Consider taking Route 89 from Great Falls to Browning. After Browning Rout 89 gets a bit twisty and winding. A better choice is State Road 464. It is pretty flat, straight and light traffic. At the end of 464, you will turn left to enter St. Mary from the north. Staying in St. Mary means you are right at the eastern entrance to the park (Going To The Sun road). A bit north is another entrance to the park that provides the trail to Grinnell Glacier, Iceberg Lake and more. Both entrances can keep you busy for over a week.
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