When I was there they had valet; the street directly in front was undergoing work. There is a public garage well within walking distance, but I did not use it because I wanted the convenience of being able to have my car quickly. I cannot say enough good things about the Delta King and adjacent old town Sacramento; both are absolutely magical, especially at night.
It 25 dollars a day per car. You may find another parking lot that’s cheaper.
Get an answer from Delta King staff and past guests.