What are the chances that the supercharger station even has power after a hurricane? You want something that is already on the property. I've had roads blocked by fallen trees for days after a windstorm event.

If you are concerned about riding through a 14 day+ event you need a generator. Even a fully off-grid solar / wind setup could be compromised in these kinds of storms. I've seen entire roofs cleaned off by a <100mph storm. Anything not bolted down to a concrete slab cannot be depended on.