The Watermill Center has come a long and glamorous way since Robert Wilson set up his creative base and arts incubator in an abandoned Western Union facility just northeast of Southampton in the early 1990s. This weekend sees the bosky campus in blue-chip overdrive with NOMAD Hamptons—the first American edition of the international art, architecture, and design fair. Its ambitious scale and immersive approach are of a piece with the large-gestured breadth of Wilson, who died last year. Director Nicolas-Bellavance-Lecompte fetches up with Giorgio Armani as Official Partner, while close to 30 top-flight galleries keep pace with talks, performances, and pilgramages to private collections. Gio Ponti’s connection to Wilson is honored with Ponti tablescapes. But because it’s summer, also feel free to stretch out on the grass with a Giorgio Armani x NOMAD Picnic by Chef Flynn McGarry. The specially commissioned textiles by Rachel Hayes are a no-go zone for ants. —Celia McGee