Do the parking lot shuttles go to all terminals? I want to park in lot C and going to Southwest airline in terminal A. Is that doable?

No problem, you have to take train and that is.

Yes. Shuttles/trams go to every terminal.

Morale

Yes it is

I parked in long term parking and took the air tran to the terminal. It stops at all terminal

If you park in Garage C, take the people mover/shuttle to Terminals A & B. You'll arrive near the security checkpoint for Southwest. If you need to go to Southwest check-in, it's a short walk across the hotel atrium.