I would encourage you to consider something different. How about rather than just seeing the Alaskan roads you consider seeing more of Alaska itself? maybe go to Seward and take a gray whale watch tour? Or drive to Denali National Park for a night and drive as far as you can drive into the park? (not too far that time of year though) or see if there are any Prince William Sound tours operating that early from Whittier?
I was in ANC last month and went to Seward. Rainy, miserable day - everything was closed except for the gas station and a diner. I'm actually thinking about heading to Kenai again and I may still drive up the Parks Highway a bit. I thought Denali NP is still closed next month, no?