Wineries in Penafiel and visits requiring appointments.

I am having trouble finding wineries that either have tours in English or that allow walk ins. I understand staffing and space is an issue so they don't want herds of people just showing up. Any ideas? We are going in October. I looked at hiring a driver for the day but that was an issue too as we are staying in Valladolid. We can take a bus to Penafiel. Help.