Also as a follow up, using SW, I would still make sure I get checked in 24 hours before to try to get an A boarding pass. I personally wouldnt wait to check in at the RAC counter as all the A's may be gone. I WOULD take advantage of the luggage part of the RAC at POP for SW though. They will still 'check you in' but it will just pop up your boarding pass number that you already had gotten.