Wyoming or Montana by chance? 
   I don't disagree  we ( family members) have  several acres  south of Jackson Hole and I  don't know if I could take the Model Y there and back. I did figure that we could all take motorcycles though need to plug in the address in the car and see what it lays out for charging.
Even if I could it is bordered on 3 sides with Forest service land so  We would take something with ground clearance  4x4 and range.
 
  I understand that most Texan's like being independent BUT, completely severing their  grid by choice,  from the rest of the USA ...
Must cause huge price spikes in an emergency
Should they need power in an emergency like when people are actually freezing to death, because systems failed from cold makes me scratch my head.  UIAM They had the option to install heating for the Natural gas generation plants that froze  and wind turbines but Chose not to spend the money because Texas Never gets that cold.
  Some Tesla owners are  backing up the grid against black outs with the Powerwall virtual power stations already.
	
  Glad we live where Hydroelectric is the main source of Grid power and  Co- Operative pricing is somewhat regulated.
 I agree with you on having back up power, Need to address that to a greater degree myself.