Glad it helped! I credit Evan (efusco) with the AllStays suggestion. He posted it here:
iPhone Charger Locator Apps other options - Page 2 Checked it out and I never knew there were so many potential 50A outlets available along the highways in AZ. And the ones I'm looking at actually look like they have things to do that will help pass the time. I found one right in the middle (155 mi) from my place in PHX to Vegas (and it's at elevation so will be bearable in the summer). Seeing all these gives me more confidence in sticking with the 60kWh+SC capability.