https://en.wikipedia.org/wiki/U.S._state_and_local_governmen...
We locked down by checkpointing the two land roads in|out of the state and requiring anybody coming in by road | air | ship to quarentine under observation before freely moving about the state.
Truckers dropped or picked up trailer loads w/out contact.
Otherwise people largely moved about freely within the state aside from a few (very few) localised incidents of COVID transfer outside of buffer zones, in each case small areas were asked to restrict movement and mask up until no more cases appeared.
That was kept up until vaccines became available and vaccination exceeded 90%.
As a state with a strong sense of self goverance by people at large this wasn't a draconion top down unwanted imposition, it was very much an overwhelmingly popular broadly supported measure with very proportionally few dissenters.