There's no supercharger in Blythe. I guess you mean Ehrenberg.Anyone used this site recently?
planning a trip from Santa Clarita to Phoenix next week.
Indio and Quartzite look like my best options in my time vs range calculations.
2018 Model 3 Performance (20" wheels) real world range +/-180 miles (at about 80 mph highway)
ABRP recommends stops at Blythe and Buckeye, but experience tells me the 2 minute savings is more than eaten up in travel to and from the highway, picking a spot, plugging in, etc. So I'll choose to stay at a charger a few extra minutes and make 1 less stop.
But here's the rub; Beaumont and Cabazon are closer to my starting point so beginning SOC would be higher and would need to charge over 90% to make Quartzite, adding time...
Anyways, Indio does get full at times, so I'd keep an eye on the occupancy as you approach and divert to either Cabazon or Rancho Mirage if it looks like it's full. Cabazon is less optimal because your SOC will be high as you mentioned and Rancho Mirage is a diversion from the interstate so there's no perfect solution, but either of those would be better than queuing up in Indio imo.