There seems to be confusion regarding SWA fliers to/from WDW.
1. Coming to WDW: ALL airlines (including SW) are handled the same. You put the ME tags on, check your luggage at your local airport, fly to MCO, go straight to the ME bus, and your luggage is "magically" transported to your room.
2. Boarding passes for SWA: Each front desk or concierge will be happy to print out your BPs 24 hours before your flight, which usually results in "A" passes (first to board after pre-boards).
3. When leaving WDW: SWA fliers bring their luggage onto the departing ME bus and check it themselves at MCO,then they can go directly to security gates, since they'll have their BPs already. (On the departure day, bell services can hold your luggage after you've officially checked out, and bring it to you as you await the ME bus, giving you freedom to do whatever you'd like until then.)
I hope I've help make the SWA "situation" a bit clearer (come on SWA

.....join in the "Participating Airline" program

)