"Roll Call 2015", huh? Looks like Janet Rupp really started a trend on this forum when she began the Roll Call 2013 thread. We had a great time planning our trip with all the other "2013er's" and an even better time actually taking the trip. We even saw Janet's motorhome at a campground in Valdez, but missed meeting her because they were out on an all-day boat trip that day.
There is now a huge database of information for your trip on this forum, including route planning, fuel prices and stations, "not-to-miss" attractions, a "don't leave home without . . " list, and tons of advice on favorite campgrounds, fishing spots, traffic jams, etc. With that information and your Milepost and Church book, you should be way ahead of anyone planning their trip who is not on this forum.
Driving to Alaska is an adventure of a lifetime, no matter how many times you have done it. So, enjoy your trip--the planning, the doing, and the other travelers you will meet along the way!