This year you can soak up its pre-Woodstock, pre-civil-rights-age vibe from the pages of a new memoirish coffee-table book peppered with photographs of family groups on Newport lawns called “A Privileged Life: Celebrating WASP Style,” by Susanna Salk, and also from the movie “Evening” — another WASP-y “remembrance of things past,” like the Susan Minot novel on which it is based.