I'm not much help in the way of suggestions. However, I grew up in *******, and am familiar with the area. Have you considered if there is anyone in Canada who could help... Unless there are rules against it. I'm pretty sure the Port near your location is open 24 hours.
But the other thing to consider is Montana, particularly NE Montana, in February... The weather and the roads could really change your plans if you're planning on traveling anywhere once labor starts... or vice versa if a midwife has to travel a long distance to get to you. You may want a back up plan.