Two weeks ago we did a Bay Area to Salem roundtrip. All Superchargers along the way were open and available. Vacaville, Corning, Mt. Shasta, Grants Pass, Eugene/Springfield and Woodburn. Not sure if you have done this route with the latest version of 6.2. There are some software quirks. Heading North at Grant's Pass, the car said we have enough power to make it to Springfield. It was at 65%. 23 miles into the trip MS told me to turn around and go back to Grant's Pass for more charge. That section of I5 is hilly with many corners. The car apparently didn't know that when it said we could make it with 65%.
Have a good trip!