Try getting across I-80 on CCS. Especially east to west where it is more uphill and the dominant winds are out of the ~West.I was curious about how much Superchargers made the fast-charger map in Wyoming look better than it actually is, so I filtered Plugshare first by CSS only, then by Tesla Supercharger only.
Both types of fast chargers seem to have pretty similar coverage.
It's only along the interstates for the most parts, but when you factor the better coverage just outside the border in all directions, a road trip through Wyoming looks very doable. For sightseeing within the state, you'd most likely still need a hotel with destination charging as a base, or do use an inefficient out-and-back charging strategy.
CCS only
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Tesla Supercharger only
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When we came across there were 2 or 3 trucks full of Rivians, and we joked that that was the only way they could get across the state without stopping for a couple of nights.