You cannot check SWA bags for your flight, but you can check your bags with bell svcs to hold until you leave.
You can check into SWA at any guest svc location. But, if you have a web enabled phone you can check in & print you pass at the airport or if you have a friend with web access they can do it for you. You don't need to print the pass at 24 hrs to get a good group, you just need to check in. You can print the pass at one of the SWA kiosks at the airport.