Visiting Glacier early September and then driving north to Calgary and Lake Louise after. How much time should we allocate north of Glacier?Not hikers. Accommodations available ?

We saw the park in two days with hikes. Spending the third day will be Overkill. Give yourself an extra day to drive to Waterton National Park by going through the chef Mountain border crossing (only open in summer). It's a short cut to Banff if you plan to see or at least stop over Waterton National Park for few hours.

This place is amazing

It only takes about 1and a half hours to get to Canada lots of hotels in glacier and surrounding towns