If you have your southwest reservation number the concierge staff will do it for you. They were happy to help us print our's out when we left RPR on 12/24/07.
There's also a business center, located by the meeting rooms, where guests have access to computers and printers. However, there is a fee for this and its hours are M-F: 7am - 7pm, Sat: 9am - 3pm, and closed on Sunday.
If you have your southwest reservation number the concierge staff will do it for you. They were happy to help us print our's out when we left RPR on 12/24/07.