We will be in Provence in July and are anxious to visit Carrieres de Lumieres. My question is whether or not it is necessary to buy tickets in advance. I have looked at the website and see that it is possible. However, the website requires signing up and giving a lot of personal information on a webpage that is not secure. So, I am hesitant. Do you think I need to get the tickets in advance? Thank you for your advice.