My travels in the Northwest Territories are limited so far – I took a trip up the Dempster Highway to Inuvik and then along the ice road to Tuktoyaktuk in winter 2010, and I visited Yellowknife as a toddler (which, sadly, didn’t leave me with much in the way of practical advice to impart).
I’m about to spend a couple months in Yellowknife, though, so I hope to have plenty to post here soon.
I recommend if you plan to go to the NWT in the summer, trying to make it to Folk on the Rock. Awesome time of year, awesome music and a good time.