Hi Dan
The Green Stone Tour never happened; basically for the reasons you quoted, it was expensive and grand, not enough people signed up to make it financially viable.
Andy C said that it may still take place again in a revised, cheaper more economic style (without the banquet at Harvington Hall and the like).
As to where the Green Stone has gone to, no one’s been told yet, so just keep your eye on pq.com; people will talk about it as soon as anything is known…