HELP! I only found out about this event at my local library, yesterday! I want to go to this event on saturday. I've only been to one of these conventions & it was in a mall. I don't know Milton Keynes well, as I'm in rural, styx Suffolk. How can I get to this event from the train station? And, it's free entry, right? I'm too late for photoshoots? I am so out of my depth, here!