Update...
There are TWO maps featured on this Blog Page.
a) SF Arts Map (Top)
b) SF Bus Trip = "Local Buses ARC to SFMOMA"

I have added a few landmarks to the SFMOMA Map and the Bus Trip Map is more complete now.
Unfortunately, there are not many buses serving the route from Sacramento to Fairfield.
It may make more sense to take the AMTRAK for the first phase out of Sac (or the Return Trip back home).
It is currently $16 from the AMTRAK (SAC) station to Fairfield-Suison (SUI) Station.
SEE: http://www.amtrak.com

UPDATE!! BLOCKBUSTER!!!
GREYHOUND is only $6.00 and takes only 30 minutes longer (2 Hour Trip) than AMTRAK (1.5 Hour trip)

RT #15 Goes to Greyhound Station.
SEE:
http://www.sacrt.com/schedules/current/routes/R015.htm