Be advised that part of the Denali road has a rocky glacier under it which has been melting resulting in the road being closed. There may not be a quick road bypass.
To us Fairbanks was interesting but not the best and not so impressed with the North Pole city with Santa.
The Kenai area is however, fantastic and has everything you want to see/do. Go to the Homer spit and take the Jenny B across Kachemak Bay. Great sights/tours in the Seward area. The fish were running on the Kenai river and it was wall to wall fishing, no RV sites available. Great sights/tours in the Seward area. Whittier was interesting with the train tunnel that you drive on. But be very careful as they are full steam and DON’T stop. Valdez was also worthwhile.
My blog has more detail, just skip to the Alaska part.
https://2013alaska.blogspot.com/
2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland
Bob