Hi Keith,
for £90 make sure the person taking the day knows there stuff and has a dog to back it up with a demo, I have been involed with ngo and bds days and both have been a lot less money, with some very good and knowleadgeable people who have had dogs to give demo's.
it's all very well someone stood there in frount of you telling you the way it done, but if they have dogs with them, to back them up, it makes it much more beliveable.