Sounds like a great trip. We did it in 2013.
I would suggest purchasing Mike and Terri Church's book "Alaska Camping." It has routes, times, campgrounds, restaurants, sites to see, when you need to make reservations, etc. I bought it the year before and read the entire book, highlighting and tabbing pages for easy access. It was a treasure trove of information and there were many things we saw that we had only read about in their book. We also used the Milepost, which almost reads like a history book.
Enjoy your trip. We traveled fewer miles per day, especially after getting to Alaska. It was a wonderful trip and we have many memories.
Dale