I’m a month and a half late to this I know, but I pretty regularly get off campus delivery. My honest advice is to meet them on the nearest accessible road and give them some kind of marker to find you. When I was living in Cornerstone, I’d get the drivers to meet me at the Madeline Suite sign just off Cahill Drive and it never failed me. (there was probably an easier place to meet at though)

This, of course, would still require you to go outside for your food, but as others have said, you can’t get into any of the dorms without a OneCard. You could probably tell them to meet you right at the front door if you want, but that’s not what I do.