I did the same for Jon's 50th and managed to find loads of people that he used to sing with as well. It ended up Friday to Sunday at the Fox and Hounds. All you need is a pub with a separate room, lots of bunk house type rooms, a campsite for vans and those foolhardy enough to camp in November. Ask everyone to contribute something to the food and make sure the pub has good beer and make sure you get someone to drive the sessions ... just add a dvd of the whole preceedings so you will be able to remember all those things that others always tell you that you did......easy! Count us in.