Ely, NV is 243 miles from Las Vegas, NV. So, while Ely, NV is a good site, would want something between. Ash Springs, NV (on US-93) looks like it has a gas station/convenience store, but power could be an issue.
I could swear Ash Springs or at least Alamo had an EV charger... they’re not showing up on PlugShare but when I drove out to Rachel earlier this year I swear I saw one.
Also there’s this link if it hasn’t been posted.
Website for the plans/etc
Nevada Electric Highway
Website of the map of NV with planned/built chargers
http://energy.nv.gov/uploadedFiles/energynvgov/content/Programs/NEH Map v2.11.pdf