My advice? Bring snacks, water and blankets. Snoqualmie pass gets fucky sometimes. As you pass through Idaho, there are several old mining towns that look straight out of The Wild West. They are good to get off I-90 to stop for lunch and explore. One town we explored didn’t have any cars. It was all dirt bikes, quads, or SxS’s. All throughout the town. Oh and word of warning about Jellystone: The closer you get to the entrances, the costs of food, gas and lodging skyrocket. Load up on beer, gas and food in either Missoula, Butte or Livingston. If you stop in Butte, the Old town is up on the hill, and you can see The Berkeley Pit which is a massive abandoned open pit mine. The lower part is just a bunch of shitty strip malls.