I can feel your excitement for this trip to Tuscany. You've planed a good itinerary and great activities, so I'm sure you'll enjoy your vacation.
My last suggestions is about an event in Lucca on Monday September 13th. The Procession of the Holy Christ, called Volto Santo, is the most important event in Lucca. Then I recommend you visit our blog about Tuscany next Thursday-Friday where we regularly publish suggestions for events in Tuscany.
Also, the Friday-Saturday-Sunday before the procession of the Holy Cross in Lucca there will be a medieval fair with market, military encampment over part of the walls near San Frediano and music and entertainment. If you can make it, I highly recommend visiting Lucca on one of those days, from Friday through Monday.