Best way to get info is to stop at a Supercharger. Experienced owners love giving information. In the 5+ years we have been using Superchargers, there have been many conversations among other owners (new and old).
BTW, in June with my M3, I crossed Death Valley to Vegas and back to the Peninsula (overnight) and got charged in Calif but Nevada was free - or at least so far (at least half a dozen Supercharging stops). California was on my credit card before I could look at my balance.
BTW, in June with my M3, I crossed Death Valley to Vegas and back to the Peninsula (overnight) and got charged in Calif but Nevada was free - or at least so far (at least half a dozen Supercharging stops). California was on my credit card before I could look at my balance.