One year. Around 2011 my ticket didn’t arrive. See told me to pick it up from the box office which I did. It was a pain as I was in a campervan and the box office was the other side of the site. I had to drive to box office and get the ticket, then drive round to campervan fields. Somehow the friends that I was meeting and wanted to camp with managed to save me a campervan space where they were camping, meet me at the entrance on foot and lead me to the said space.