My plans are still a bit up in the air due to some health issues in the family, but I hope to make a pass up through the eastern provinces of Canada myself.
Much of my route has yet to be determined, but I hope to make it up to Radisson, QC and over to Goose Bay, LB. Along with those somewhat far flung towns, I'm looking at trying to get to the end of the Trans-Taiga Road (the most northern road in eastern Canada) and over to Cape Spear (the eastern most point in North America). I think all of those destinations will go along nicely with having been to Anchor Point, AK (the most westerly point you can drive to in North America) along with Dead Horse, AK and Inuivik, NWT (the two roads that take you across the Arctic Circle in North America).
A big chunk of these roads will be dirt/gravel, and there are several stretches where extended fuel range is required. On the Trans-Taiga Road, there is one place to get gas that is 190 miles from the end of the road. To get from that supplier/outfitter to the end and back will require a range of 380 miles (at a minimum). I'm going to guess that much of that road will be pretty much wilderness and very deserted. I'm looking forward to giving it a shot if I can figure out a way to carry enough gas. I'm close.