A few notes to your report:
A) If you have the driver's instrument cluster in "Enhanced Mode" you'll see on the left alternating dark and light green bars. Each bar represents 5% of SOC. There are 3 white marks to denote the 25, 50 and 75 percent thresholds. It's a crude scale, but gets the job done. With the higher capacity of the Bolt's battery pack, getting down to 1% SOC increments is less necessary.
B) You can get the exact SOC% from the myChevrolet app which will give you it in the 1% increments you want.
C) You could have easily skipped at least 1 of the DC Fast Charging stops, and possibly 2 of them, and potentially just made it home with one stop. But given that this was your first outing with the car, and a long distance one at that, being cautious was the smart play.
D) If you charge at a high SOC, you won't get as much in 30 minutes as if you charge at a lower SOC. Best to charge when SOC is between 20% and 50% SOC to maximize your bang for your buck. I went from 21% to 60% in 30 minutes and got 22 kWh and 76 miles of range.
And most importantly, welcome to being a Bolt owner! Since you are coming from a Leaf, it will be good to hear what you have to say about the difference between the two cars.