I been to the RHS gardens at Wisley with the American Ivy Society. We were touring many of the outstanding private gardens throughout England, which are not open for public viewing, along with some of the larger public gardens, of which Wisley is centainly on of them. I especially like the champion trees that grow at Wisley. Even though I was, at one time, a RHS member. Wisley, is a great garden. - Millet