I appreciate your suggestions and after working through the daily mileage and our places of interest I agree with everything you have said, including the points about longer drives. Thank you. Sorry for the jumbled post, It was way too late to think that through.

We will have to put off Seattle and the Washington area for another trip, as well as the Black Hills.

Yellowstone is the ONLY place we are committed to as we are meeting friends who are driving from Colorado.

That said, Here is a revised layout of our drive:

Day 1: Stockton to Salt Lake City, UT - 699 mi – about 11 hours 11 mins
Day 2: Teton, Wy - 312 mi – about 5 hours 44 mins
Day 3: Enjoy Teton National Park
Day 4: Yellowstone National Park, WY - 51.2 mi – about 1 hour 14 mins
Day 5: Yellowstone - Sept 16
Day 6: Yellowstone - Sept 17
Day 7: Yellowstone - Sept 18
Day 8: Stop at Shoshone Falls Id then to Boise, Id - 440 mi – about 7 hours 33 mins
Day 9: Portland, Or - 428 mi – about 7 hours 18 mins
Day 10: Portland - Sept 21
Day 11: Eugene, Or - 111 mi – about 2 hours 11 mins
Day 12: Jedediah Smith Redwood State Park - 215 mi – about 4 hours 6 mins
Day 13: Redwood State Park
Day 14: Eureka, Ca - 93.0 mi – about 1 hour 42 mins
Day 15: Eureka day.
Day 16: Fort Bragg - 133 mi – about 2 hours 31 mins
Day 17: Stockton Ca - 224 mi – about 4 hours 14 mins

We cant make this trip with all slower days, but I think that the long days followed by sufficient rest will suffice.

Let me know if you think this is practical or have other ideas.