All I see on the Tesla charger map are Tesla level 2 destination chargers.If you're thinking the Town Pump station, Plugshare says it has CCS and CHAdeMO, which proves my point for the need for a CCS adapter.
Is there something else north of Missoula, like an official Supercharger or Tesla-compatible DC chargers like EVgo? I'm not finding anything on Tesla or Plugshare.