I'm intrigued by the interpretation of the Shire as Oxfordshire. Tolkien grew up in the West Midlands, and the area around Sarehole Mill near Birmingham is, I thought, understood to have inspired much of the Middle Earth landscape. There's a folly in Edgebaston that's supposed to have inspired the Two Towers.

Not that I am remotely interested in Tolkein as a writer, but I am a pedant. And I also thought that Ernesto and his mates might like to visit some of the relevant locations while they're in England, as they obviously are into Tolkein's work.