If you go the route through Ketchum on your way back, there are plenty of destination chargers through there. You could stop at one for an hour or two and grab lunch if you think you’ll be cutting it close.
Depending on where you’re staying, you can also plug into a 120 overnight and be fine. (Doesn’t apply if it’s a day trip, of course)
If you have the chademo adapter, mountain home has 50kw chargers you can use (someday in the future there will be a supercharger there, although it’s been “planned” for quite some time now)