Delaware Shakespeare, the Brandywine Valley’s only professional Shakespeare Company, creates “magic in Rockwood Park” for three weeks every July during its Delaware Shakespeare Summer Festival. Picnicking beforehand is definitely part of the experience — and some groups bring an elaborate spread — but you can buy food and wine on site if you prefer, and once the sun starts to fall in the sky, the stage lights come up for another night of theater, outdoors and under the stars.