Hi! I would like to book my first JY trip to Istanbul in November and just wondered what people usually do about pre-booking the optional tours. Do you go for them all, which can be quite expensive, or book them on the trip as and when? Those I definitely want to go on I will pre-book. However, though not sure about the others I don't want to miss out either! I'm quite nervous about my first trip, but also excited! Elaine