My family is traveling to Italy in July 2014 and we are looking for a guided tour of Doge's palace w/the secret tour as well as the inside of St Marks. We were anticipating 2 hours at Doge and 1 hour at St Marks. Based on our travel plans, this tour would need to take place on July 3rd. All of the guided tours that we found on line either 1) include other sites in Venice or 2) Do not include the secret tour. We would prefer a single guide so that we can accomplish these two sites back to back. Any guided tour recommendations would be appreciated.