I got a couple of flyers in the mail this week for this event on the 4th of October (the public holiday long weekend). Last year I went along after work and met Phill there. There was a good variety of vintage cars, and a lot of BMC cars. They had a book sale too, and I picked up a nice copy of the mini workshop handbook.
Keep an eye on their website (I can't see it on there yet though)
http://motorlifemuseum.com/
I'll probably be going along, it'd be good for us to support the Motorlife Museum as they have us every year for our show n shine.