For anyone planning to take a road trip in an EV, there are really good tools that allow you to avoid almost all of the issues the author faced due to bad planning. The Tesla navigation system has one built in that takes into account supercharger closures, but there are also https://evtripplanner.com and https://abetterrouteplanner.com , which are highly customizable and quite nice.
The one issue that might have been unavoidable was having a supercharger be closed unexpectedly while you are driving towards it, but I suspect that Tesla indicates impending closures on the display, and you can also call their roadside support line to clarify details about impending maintainence if you are worried.
For this particular route, https://abetterrouteplanner.com/?plan_uuid=45a1f1bd-5697-448... finds a route with just under 2.5 hours total charging time, and 10 h15m driving time.
The one issue that might have been unavoidable was having a supercharger be closed unexpectedly while you are driving towards it, but I suspect that Tesla indicates impending closures on the display, and you can also call their roadside support line to clarify details about impending maintainence if you are worried.