With all due respect to M&T Church and their Alaska Camping book, I think it's redundant if you have a MILEPOST.
The Milepost is updated every year. The Church Book has a 2014 date on it which means the research (a real trip?) was done in summer of 2013.
The 2016 Milepost was researched in 2015. 2 years can change a lot.
For my money I will stick with the original and to my mind the best.
The Milepost....BTW the first one I bought was in 1972 when I was re-stationed from Biloxi MS to Elmendorf AFB in Anchorage and drove my old Calif Highway Patrol car which turned over 100,000 miles just as I crossed the Oregon Border going north. but it was still the fastest and best handling big American sedan I have ever driven and uniquely suited for the trip which I made in late November.