Oscar,
don't you worry, you will have a great time. I think all your questions have been answered. Be patient with the organisers, it is more or less an overgrown familiy part-time job for them and they do a magnificent job.
Ride is on sunday. The rest of the weekend *is* the event. Gaiole is small and l'Eroica is big.
I'll be there, too. If you see a german guy with a blue Learco Guerra-jersey on an orange Cinelli Mod.B, that will be me