What is the least crowded time of day to schedule a "skip the line" tour of the Vatican with children? Will be in Rome at the end of May. We cannot justify spending thousands of dollars for an after hours tour, and we are concerned that it will be so crowded that our kids (aged 10) will not be able to see anything, or get trampled in the crowd. Also, do you have recommendations on a tour guide who will taylor our tour to suit adults and 10 year old boys? Thanks.