A greenfield site gives you nothing. No power, no hard standing, no shelter, no cable routes, and ground that turns after a night of rain. Everything the event needs arrives on a truck and leaves the same way.
DSD builds the full production: a roofed stage on distributed load, an LED backdrop, a PA covering an open field where sound simply travels away, lighting rigged into the stage roof, and the cable management that keeps a wet field safe.
The screen matters more outdoors than in. Beyond about twenty metres a performer is a shape; the screen is how most of the field actually sees the show.