Seems like whitefish or Kalispell have decent Airbnb/VRBO options and are as close to the main sites as anything. I don't see much on the East Side of glacier. We'd probably rather pick one place and stay their for about 3 or 4 days than packup and switch to different locations.
Any reason not to stay in the whitefish or Kalispell area? One better than the the other. Kalispell I realize will likely feel more like a city with shopping and such.
We'll plan our activities, hikes, sites and such later but feels like we're a little behind on getting a place for only 4 months out. Going mid to late July if it matters.