Yes, I’m familiar with most of the wineries on your list, except for Jalloto and Foz, the only ones I haven’t visited.
As to lunch options,
the Quinta do Bomfim engaged Michelin-starred chef Pedro Lemos of Porto to open a “pop up” restaurant above the town in its Casa dos Ecos house with sweeping views. It’s still going strong after two years so not just a “pop up”. I haven’t been.
Quinta Noval gives private tours only and one can have lunch I believe, if pre-arranged, but I don’t know if they require a minimum number of participants. We visited but had lunch at Cozinha da Clara because when booking our visit we didn’t know about a lunch option. but again, it’s private visits only.
Croft has outside picnic tables, but I don’t know what sort of picnic experience they offer at them.
Seixo also offers a picnic option. Seixo does take large groups from the Douro River cruise boats.
Quinta do Crasto offers a wonderful, multi-course, traditional winery lunch in the dining room of the mansion for a set price, including wine. This one isn’t to be missed if you book well in advance and ask them to meet you at the tiny Ferrão rail station below the estate. They will pick you up there if you take the train from Pinhão. Both the winery and the lunch are extremely memorable, but this does take a good portion of the day, and after lunch you certainly won’t want to drive! It’s a very “challenging” road!
Details here-
We did enjoy our lunch at Cozinha da Clara, especially my arros de mariscos, served in a Staub pot, and even their entry level wines are excellent.
