@ossobuco,
Ill be in STOCKTON in the next month and I wonder whether there arent any galleries that feature works by the CAlif plein aire and landscape artists of the 20's through the 70's.
Maybe I can get my ass out of STockton after meetings and head back to SF and spend some time, or run up to Sacto and hunt the state museum.
When I lived in Sacto, I think I devoured all the available museums and found them fairly sparse at the time. (late 80's)