We did the trip this summer (50 days and 12300 Km) not enough time to enjoy, but we did see a lot and will go back and spend more time in the places we liked.
Fuel is not a big issue, just fill up when you get near a 1/2 tank in the more remote areas.
We used an old Milepost (2009) as a guide, but I found the book "Adventure Guide to the Alaska Highway" a good resource.
I preferred the gravel Hwys (Campbell, Dempster, Taylor) to the paved as the frost heaves are graded out. On the paved roads slow down and let the faster traffic pass you. The worst frost heaves were on a road to Lake Louise Alaska - it was a roller coaster.
Bugs were bad this year as Alaska and the Yukon had a cool, wet summer.
If you plan on doing any tours get the Alaska Tour saver coupon book.
If you bring your toy, you will not have much use for it once you get into the tundra - not many trails and there are weight restriction on other trails (8 psi per tire).
We left our bicycles at home - wished we had them as many communities have bicycle trails (paved).
Take your time and enjoy.
