Banquet in Yellow 30 (Honey Bee)

I came upon this bank of beautiful yellow flowers beside a bike/nature path. Bumblebees and honey bees flitted among them, while bright orange bugs with black markings were mating on many. Smaller green bugs moved about on some. White butterflies drifted past, ants moved among the leaves... all told, they were very popular. I still haven't identified the orange-and-black or green bugs, but hope to.