I would think less than two hour drive. We hit some wineries inbetween and spent the night in Amarante which is a cute town with a Michelin Star Hotel & Restaurant. It is easy driving so relax.

I understand that the Quinta offer opportunities for people to participate in the grape harvesting and then "stomping of the grapes" during the month of September. I think people are expected to actually work rather than "play at it". I would suggest contacting the Quinta direct about such opportunities.

Ola Maria Gorete não sei como estará o clima em novembro. Sugiro olhar no site. A visita é uma experiência única. Eu recomendo.

No. I brought my own.

Therer is an airport just outside of Oporto but if you plan a trip down the Douro Valley you will probably need to hire a care as public transport would appear to be very limited. Some of the hotels e.g. Six Senses have their own cars / drivers but it can be expensive for the 120km trip.

On the website they have the option to book barrels. However, they do book up quite in advance. You can also email and see if any are open for your stay.

No reservation required for touring. If you eat at the restaurant, the tour is free. Timing worked out and I joined the next tour.

Sim

Alternatively, you could get a train to Peso de Regua and then grab a cab from there - it is a 5-10 minute drive (or a ½ hour walk across the bridge and then to the right just behind the big Sandeman sign).

Creio que foi 15€ por pessoa, mas foi uma visita guiada muitíssimo esclarecedora com um excelente guia, com direito a prova de 5 vinhos do Porto, um dos quais foi um "VINTAGE" excelente. Vale a pena.