Adding wild flower is a good idea. But the town has been spraying for mosquitos for so many years that bringing in pollinaters is also a good idea, Preferably native species that might become re established in the area. An idea I just had istoget a hive and keep it most of the year on a nearby ranch. Bring it to the orchard (breeding area) during bloom and moving it back for the rest of the year, But I'd have to check what is being sprayed on the ranch land, Aerial spraying is a big industry here,