Bus from Firenze to Santa Lucia/Traversa

I’m hoping that someone is able to once again help me with my plans to get from Firenze to the German Cemetery that lies beside the SS65, the Strada Statale della Futa between Santa Lucia and Traversa (near the turn off to San Giacomo).

My original plan was to rent a car from Firenze and drive there, but I’m trying to avoid that. The map I have shows a bus route along the SS65. We would like to pack a lunch and spend a few hours in the cemetery.

Is there a bus schedule available that I can get hold of? The SITA website is in Italian only and attempting to translate back into English is difficult. We're quite able to just hop on the bus but want to be certain we can return back to Firenze later that same day. As used to bad weather as Canadians are, a night spent outside of the comfort of our Firenze apartment doesn't appeal to us :)

Smiles from Canada