You don’t need a supercharger to charge or even to fast charge. Other chargers work too. There are CHAdeMO chargers in a lot of places (need an expensive adapter, $450, but very worthwhile purchase). Mountain west? I’ve been seeing CHAdeMO all over the place… Grants, NM. Pagosa Springs, CO. Santa Fe, NM. Lewiston, ID. Taos has a surfeit of Tesla (non supercharger) connectors, most free! Or there’s J1772, everywhere practically, a slower option best for when you need to stop for other reasons, and the adapter comes with the car. Chargers are popping up everywhere. And electrical outlets are in every building pretty much so sleeping in the right place helps too.