Roadtrip:POrtland to Glacier and back

Camper Van Road Trip Articles
Driving solo from Portland to Glacier National Park in July. I was hoping to get suggestions on different routes to the park and back to Portland with ideas for sightseeing and possibly lodging. I was planning to take 2 days to drive each way but I can take as much or as little time as needed. Thanks in advance:)

The Great American RoadTrip Forum – Planning Summer RoadTrips