Delivery is actually more resource-efficient if the store isn't within walking distance of its customers. If instead of making 10 people get in their car and make a round trip to the store/warehouse, you put 10 packages in one vehicle and deliver to everyone in the same neighborhood with one trip, you're looking at an order of 90% less wasted emissions.
Tell me you’re in the US without telling me you’re in the US :)
Three states over and back would be a day or two minimum, but potentially nearly a week on the west coast. (Depends on start and stop locations obviously, but if you start from eg Portland, three states over could be the Dakotas).