I live in the city and have a mail carrier that walks from house to house. I can't fit things in my mailbox and don't want to leave the on the front porch. I have a piece of paper with a note asking my carrier to pick up the packages from the back porch. I leave the note on my mailbox, and my carrier will come to take them. This way I don't need to schedule a carrier pickup online.
If you want to schedule a carrier pickup, though, there is a place to indicate where the carrier should pick up your packages, so this should solve the problem. To use carrier pickup, though, you need at least one package being shipped via Priority Mail.