Once upon a time I thought you could get xtra copies of the Milepost map, "I think" means I may not be remembering correctly. Buttttttt, who puts out a good overview planning map. The MP map has it a...
Bell's guide also has a nice small map, with Alaska, Yukon, Northwest Territories, British Columbia, and Alberta on it. Not real detailed but a good quick reference map. We hope to find them again so we can mark one up when we get home to show people our route. They already think we are crazy doing almost 5 months in a truck camper.( We are already in discussions about next year's destination! and we are only 1/2 way through this trip)