Thanks
@ewoodrick for the advice; all excellent points. I've just gathered the addresses of all the superchargers along the way as well as distances between them to be able to do some "quick math" as needed in case some detours/alternates are a better bet.
In terms of "charger working", will a call to the roadside assistance number result in a yes/no answer? When calling, how do I identify the supercharger that I have a question about? Would I give the street address or the name of the supercharger or both?
As a side question, in terms of GPS biases, do you think that double-checking the Tesla gps with Google Maps &/or Apple Maps would be a good approach? If there's discrepancy, I can choose one or the other... just wondering based on the approach of measuring the same distance using two different instruments.