Update. I ended up driving only about 2000 km. in 4 days. The plan below was WAY TOO MANY HOURS behind the wheel.
I skipped the backtracking to Jumbo Pass.
I have 4 days, up to 3000 km in my rented CanaDream Camper Van.
Short hikes and bike rides along the way.
Here’s my itinerary, so far. Of course I’ll change this on a whim once on the road starting Friday August 21.