In reply to Sam_in_Leeds: there's 1000 parking spaces, so I imagine it'll be fairly full, so they're leaving Embsay about 10 aiming to get there for 12ish. I think the pain will be getting out.
The park at Meadowhall thing was ok, and of course you're straight on the motorway, but mrs a would rather drive all the way there.
Thankfully I don't have to go this time - although sadly I will be taking my daughters and their mates there to Wand Erection in April.