What happens after the first 80 miles and your new Tesla runs out of juice? Yes, 80 miles. In most of this country you need to use either the heater, or air conditioner. That limits your distance for "fuel range anxiety" to about 80 miles, assuming you have a NEW battery.
Maybe you could drive over to the nearest Chevy dealer and get a trailer hitch added, so you could pull a trailer with a generator on it.
I believe the trailer-pulled generator accessory is only available on the deluxe model.