"But they have this inconvenient policy where they won't deliver food inside your fort."
Could you possibly has some form of "food fort", perhaps through you mail slot, where food can be stored for the required three days? True, you'll grow weary of pizza, and other flat food, but it's the world Thump has placed us in.
In reality, as caretaker for parents with combined age of 190 years, I make that attempt to quarantine food. It's certainly easier than shoving a UV light bulb inside every package, avocado and orange. (But how to shove a light bulb inside a light bulb?!)
NICE! Thank you.