We live on that route, just east of the BC boundary. We travelled to Prince Albert on that route a few years ago. We thoroughly enjoyed it - not so much traffic as southern routes, not as hot or dry, campsites with lots of room and many places to use our canoe. At Prince Albert we headed north to Lac la Ronge, which was even more so. No problems with the highways except a stretch of construction that will be nice new pavement now.
There is a great campsite on the east end of Slave Lake, just north of the town of the same name.
Slave lake provincial parkThe sand dunes day use park and the campsite are both worth visiting. There are usually large waves hitting the beaches - kids love them. The campsite is high above the beach on sand dunes. Boating is better on the west end of the big lake where there are less spectacular campsites.
We also enjoyed camping and canoeing on Meadow lake and other lakes in Saskatchewan. Lots of lakes and forests in the north.
2004 E350 Adventurer (Canadian) 20 footer - Alberta, Canada
No TV + 100W solar = no generator needed