We're in Columbia Falls, only 20 minutes away from the West Glacier entrance. GNP is in our backyard, and our favorite weekend hangout. While we've camped on the East side, we tend to frequent the West side campgrounds, Apgar and Fish Creek.
My best piece of advice is to check the nps website to check campground availability. Fill up days are slowing down now, but some campgrounds close after labor day.
And if you choose to stay on the East side, be sure to visit the Two Sisters cafe near Babb (best pies in the state).
Good luck and safe travels!