I took it along, found a nice spot and chilled out in the same spot all day. I'm thinking it's the way forward, as I got the camera ready for the first lap of each race and ended up catching loads of crashes. It was at least as busy as you described so I'm glad you have me a heads up on that, I left an hour earlier in the morning and only had a 10 minute queue to park thankfully.
Were you right up next to the Clio crash yesterday? I only saw it from a distance but it didn't look nice.
Will do a proper thread in the Motorsport Media section, but here are a few shots...