I'm very happy to report that early check-in (about 12 hours early) worked great for my HNL-SFO-YVR flights this week. Dropped two bags, and caught The Bus into town. Day passes for the bus can be purchased from the driver and were $5. The fare went up on Jan. 1, but it's still a great way to get to Chinatown/Ala Moana/Waikiki for the day before returning to HNL for an overnight flight.