Jonny,
You will have noticed on this forum Fax tends towards the "glass half empty" side. In reality, unfortunarely, he's a lovely bloke when you meet him.
Anyway, here's my take on it. Like all things it's not what you know, more who you know. If you know how to work things, you can get closer to the action. You can also speak to the drivers at the Parade in the old town on the friday. So it is possible to get driver access.
And yes Johnny Herbert was well accessable last year mainly cos he only raced in the Classic warm up race (which he won!).
So don't let Mr Grumpy put you off. Sure, things on the racing side aren't perhaps what they once were, but it's still nowhere near as bad as Fax makes out.