Costco Distribution Center operates by appointment only, with receiving hours from 5:00 am to 12:30 pm, Monday to Saturday. Drivers can arrive the night before their appointments and check in at 4:00 am on weekdays and at 4:30 am on Saturdays. There is night parking available, and upon arrival, drivers should check in and receive a pager that indicates the unloading door number. It is important to keep cargo documents in the truck at all times. The unloading process is generally quick, often taking no longer than one hour. Drivers are advised to check in only 30 minutes before their appointment to avoid being sent to the waiting lot. While the staff is friendly and there is ample overnight parking, some drivers noted that the portable toilets could be cleaner. Overall, the experience at Costco Distribution Center is efficient and straightforward.