I need some hints for getting 3 nights' worth of clothes into a very small bag. Not even a rollerboard. Something that will fit into the overhead of a Horizon Bombardier 400. Maybe a backpack or slightly larger. I don't want to wait for the a la carte, we have a tight connection and just want to deplane and go.

But I'm not sure I can do it. I'm a packrat by nature.

What exact clothes would you bring for 3 nights in San Francisco in May? (men and women since my husband is traveling with). Not going anywhere really fancy.