I've never been to Yellowknife and think I'll take a ride up there around the end of June. It looks like gas along the route is pretty easy and there's a decent motel in Grimshaw which is good halfway point to spend the night. That makes about 1400 Km's on Day 1 and about 1100 on Day 2. Maybe take a flight with Buffalo Airways while I'm there.
Anyone know what the route is like north of Grande Prairie ? My understanding is that the last stretch into Yellowknife was paved in the last few years. And the ferry near Fort Providence runs until midnight.