I'm camping, so I'll be there pretty early to hand out passes, but as far as I'm aware, if you've got a stand pass, you can turn up whenever. Mods please correct me if I'm wrong!
I'm thinking it would be a good idea to send a PM with my mobile number on, closer to the time, to everyone on the list. That way, just call me when you're queing to get in and I'll come find you with the stand pass. I'll most likely be sat at the entrance watching the cars come in anyway.