Greetings!
Just got back from a week at SSR; I'm going to post a trip report, but I have info on this topic. (I started a thread on this a few weeks ago....)
The evening of our last night, DW called the SSR front desk and asked if they would print out Southwest boarding passes for us the next morning. The CM told her no, that we'd have to go to the Y&BC Business Center to do so. I then called the Y&BC BC to 1) make sure this was correct and 2) inquire as to their hours. A nice CM named Terry (Terrie?) said that they'd be glad to, but she thought that all WDW front desks had been cleared to print out boarding passes for guests. We went out to dinner, then DW called the SSR front desk again. The nice CM named Autumn (not the one she'd talked to earlier) at first said no, but when DW quoted Terry, Autumn said she'd "Check with the Operations Team". After a brief wait, Autumn said that there had been a policy change, and that yes, all WDW front desks are allowed to - and have the necessary access to - print out boarding passes for all airlines. She told us that any CM could help us, and that they'd have to use a computer "in the back".
At around 8AM on departure morning, I took the four confirmation printouts and went to the Carriage House - CM Cassandra helped me out. She said "no problem" - I was anticipating having to tell the "policy change" story, but didn't need to. She took the info and went in the back. ONE KEY NOTE: these CMs don't necessarily have experience with your airline's web site - another CM had to help Cassandra find the "print boarding pass" page on the SWA site; in all fairness, it isn't obvious to a newbie, but you might have some hints ready.... But we got the passes ("A", 9-12 for those keeping score).
This is official, at least per several SSR/Y&B BC CMs and the "Operations Team" on 12/11/2004.
Be well!