Backtracking a bit on making fun of the state of Montana, eh?
I used the New Zealand analogy only because they are a remote island that cut themselves off from the world; borders closed to all foreigners, Air New Zealand flights suspended indefinitely, ocean ports closed and tightly monitored for cargo, etc..
None of the 50 states has an option to do that. Heck, the USA can't do that either. We are not going to become East Berlin like New Zealand has tried to do. Thankfully, our Constitution prevents any state from closing off its borders to another state.
As for population density, how does a very spread out state like Montana get such a higher rate and more efficient use of Covid vaccinations compared to California with all our money and big government and tech industry? You want to find a way to make fun of Montana for this hard data instead?...
State Vaccination Rates as of March 8th
Montana = 83.1% Vaccine Supply Used, 32 Doses Per 100 People, 11.4% Population Fully Vaccinated
California = 77.8% Vaccine Supply Used, 27 Doses Per 100 People, 8.6% Population Fully Vaccinated