I am launching on a RS tour (my first!) from Rome for Heart of Italy. I plan to come in two days before the tour start. This will afford me to see some things on my own and hit particular sites that I won't get on the tour, like to Borghese Gallery. I'm weighing whether to stay nearer to the Vatican or Trevi Fountain area. I think there may be more to offer closer to the Trevi. Am I headed in the right direction?
Bonus question: Other suggestions of what else to see that I might not get on the tour?