Hi Chris. I can’t help with the park and ride info, but I would definitely say you’ll need to get on the earliest bus you can to try for a good spot. Most general admission people were at the gates before 5am last year!
My group are camping at Whittlebury Park (http://www.whittlebury.com/index.php?pag=cms&id=240&p=camping.html). It’s £145 for the plot anytime from Wednesday until Monday, so not cheap, but might work out a bit cheaper depending on how many people you’re going with.
Sorry I can’t be more help.
You still need some help with this? I can have a go.
I could do this, if you can explain exactly what I need to do.
I could translate Spanish for you, though I’m much better at written Spanish than spoken, so I wouldn’t be so useful for videos.