The 'Milepost' is a MUST. It will give you so much history of the roads you're traveling. If you just pick up those little brochures from the visitor centers you'll be overwhelmed with trying to sort them out. Just skip all that necessary paper and get the Milepost.
I will say, don't rely on the Milepost for your campground ideas. Those are all paid ads by the campgrounds and they will all sound 'perfect'. Instead, get Mike and Terri Church's Alaska Camping book. It also includes the Yukon and Canada. They list ALL campground, public and private and also give some great boondocking spots. They lived in Alaska and still travel back and forth updating their book.
Those are the only two publications you'll need for the trip.
