I've been through there on two trips to Portland and back but it has been a few years. From what I remember it is a stop where all passengers can get off the train for 20 minutes or so. Therefore it is a good stop to get the bike box on or off.

You can test the wind and if it is from the East get back on the train and head for the coast to start out 😀 I don't think there are many baggage option stops to the east but you have East Glacier or Whitefish to the west.