I agree with most of this but, the Goldstone was in the middle of a residential area with lots of free parking available for those who wanted it..
The Goldstone handled big crowds when very few people had cars so parking doesn't really come into it - the 36,000+ who made up Brighton's biggest gate wouldn't have got home by car.
The people who say that there will be ways round this are perfectly right - thousands of people make their way home from football stadia every week, some of which are in the middle of nowhere. I've been to evening matches at Reading, Northampton and Rushden (all pretty isolated) and still managed to get home by public transport.
And Notters, I'd dearly love to see you walk from Falmer to Brighton station in 45 minutes. I live in Coldean and it takes me about 20 to 25 minutes to walk to Falmer and about 50 -55 minutes to walk to Brighton station (and I'm a fast walker). It would take a good hour to do that walk.
Me, I'm going to cycle to Falmer, I'll do it in about 6 or 7 minutes and plenty of places to park the bike.