We were there last August. Three nights in East, a week in west (more because of breakdown). By far the East side is the most scenic and the most sparse of anything - it is Blackfeet nation. The KOA there isn't bad - I've seen much nicer but also much worse. But the scenery is beautiful. West side, IMHO, is touristy. If I went back, it would be to the East side with maybe a couple of day trips to the west side.
I'm sure you mentioned at the time, but what route did you take to go from the east side to the west side of Glacier?