Hmmmmm..... Vintage at Goodwood is becoming Vintage on the London South Bank. You only have to take a look at the photos from last year's festival to realise that there isn't remotely the outdoor space to recreate last year's event. And without the camping the 'festival' experience will disappear.
I'd worry about high ticket prices for individual events in the South Bank concert halls and droves of visitors to what may be free outdoor spaces ignoring the Vintage dress aspect that made it a pleasure last year.
At least we'll have the photos to remember the experience. A few here, lots more at the links above.