95% of the time, 1 camera with a 21mm or 35mm prime. Maybe a lens cloth in a pocket and a plastic bag if there's a threat of rain. If there's an event (Women's March, Political Protest, Gay Pride Parade, Air and Water Show, etc.) I might carry two cameras, one with a 21mm, and one with a 50mm or sometimes a telephoto. Maybe an extra memory card too. Almost never carry any kind of pack.