a suggestion:
most people drive the Seward Highway south out of ANC but never see it from the other side of Turnagain Arm. Check your MILEPOST for the road on the other side from Route 1 that goes to Hope. I've done some outstanding photos from that point of view. I don't know about taking an RV there.
I think you're making too much of a job out of this vacation. Driving too much and too far.
In all my decades of trips in and out of Alaska: living and working there, visiting and touring, I've learned to slow down and specialize. One glorious trip I spent 2 weeks along Turnagain Arm. I saw thousands of people drive past at speed while I was on foot taking my sweet time. I use the drive, park and hike method of seeing Alaska and will continue to do so as long as my legs will carry me.
I spent a day in the village of Hope (hundreds of people visit there a year!) and talked with gold miners who were still making a living in that area. They showed me where and how to look for gold nuggets.
There is so much more to Alaska than 99% of the visitors ever experience. Don't even talk to me about those who do the cruise/land tours and sleep on the buses along Turnagain arm! Makes me furious!