The GPS cannot be trusted to find real gas stations at times on the way to ThunderBay! I would say carry extra gas as well. Also be careful of moose and other forest creatures but moose can be bad. During the day its normally ok but as dusk approaches beware.
It is about 10 hours really counting stops for gas and food. It is a nice trip and the roads do get much better as you head east. Manitoba is too buys sucking our money out of us to fix anything out here!(Roads in particular!)
I would ignore Bubber, he is old and knows not what he speaks of!