Route to Alaska all the way through Canada?

We use Hwy #2 from upper Michigan to Shelby, Montana and then up to Sweetgrass to enter into Canada, when we go out to western Canada(Alberta), except where it dips way down south. We then head up to Marquette, MI. and keep going until we hit #2 again. We were out there this past summer. The highways are pretty good with road construction here and there. The speed limit varies with the state that you're in. Montana used to be whatever you thought was safe and prudent but they do have a speed limit now. Granted we are from southern Ontario but after going through Chicago one year we will never, ever, ever, did I say ever, take that way again. There aren't any problems getting diesel or gas. There are plenty of half decent campgrounds to stay at and if you get in early enough, like we do, you don't have to worry about reservations. Yup the price of fuel is different in both countries but it's falling daily with diesel here being more expensive. Last night gas was 88 cents a liter and diesel was $1.10 a liter. A US gallon is 3.785 ltrs and a Canadian gallon is 4.546 ltrs. Enjoy your trip whatever way you take to get there. We haven't been out west via the Canadian way in 36 years now. Just find it better for us to go through the northern US.