Thanks for all the replies.
Ended up using PCA. Utterly easy to get too from 101 southbound. Bus right away to the terminal. Arrived back tonight and waited no more than 3 or 4 minutes before a PCA van came by. And if you don't have paper coupons handy, this website will give you one.
http://www.parkingcompany.com/sanfran/coupons.html
Thanks again, all