In Portugal I know folks that drove from London, Paris, Utrecht (Netherlands) and even Moscow to avoid the no fly laws so they could vacation here. I personally know 3 families that drove from Moscow to the Portuguese south during the lockdown period. (And I am sure based on the foreign plates I saw, various orders of magnitude more did so as well).
This is not to say it was all the foreigners, but it is much easier to control a pandemic if you can close all the borders (Madagascar anyone?) and have a smaller population. (This is also not to say NZers shouldn't be praised, but just a land border with 2-3 countries would probably see a lot of these efforts go to waste)