Twinkies are not essential outside of Zombieland.
But we are back to the isolation/quarantine situation.
The power, water, etc stay on, but non essentials are hardly going to be delivered.
Deliveries can still be made, trucks drop trailers off at quarantine line, persons from inside come out to get the food after the delivery is made.
Solutions are not complicated, long as everyone involved understands the situation.
And the end.