Hi
The first advice is easy: The region is either called Piedmont (from the Savoy history) or Piemonte (the Italian version), but not Piedmonte. It’s a not uncommon mistake.
Serralunga d’Alba is a nice choice, not very heavily touristed, and with a nice village centre to stroll around.
I’ve got one cute option for your back-pocket of another winery visit you could easily sneak in… Sergio Giuduce on Piazza Umberto I (#15). He’s a charming elderly gentleman, still making Barolo and he accepts drop-in visitors to his tasting room there (it’s his front room I believe). We had a lovely chat with him, and tasted 2-3 wines, buying a bottle to take home.
Of those for the one full visit, I’ve tasted at Schiavenza and (Franco) Boasso (aka Gabutti winery). Both were good, though rather different in approach.
Schiavenza is run by a young couple who have a wonderfully serious, professional and questing approach, her in the restaurant and him in the downstairs winery. It a super place to combine a visit and meal, indeed we did the tasting separate to the winery tour, with that done as a gap between courses in the meal! I very much rate their Barolo wines, but beyond that I think their attitudes are likely to see them get better each vintage. They have a number of single vineyard Barolo wines often in std and riserva forms, so there can be a lot to taste through.
Boasso older and very much an old school winemaker. We’d gone into the tasting not expecting too much, but came away very impressed, and surprisingly it was the rather cheap Barbera that was our wow! wine, partly for value for money, but also it absolutely hit the style we like (at 10 years old there was a touch of barnyard / leather that really suits us).
Neither did vineyard tour, but you do get the usual flow from crusher to fermentation vessels to barrel store to bottles, typically followed by a tasting in the tasting room. We tend to assume ~90 minutes is the average visit length.
We did also taste at Cucco, which was pretty disappointing, but it’s since changed hands, so no idea whether they’ve upped their game.
Other options: Vigna Ronda, Luigi Pira, Ettore Germano (perhaps useful as they have fizze and whites, including a Nascetta), but there are others as well. Let’s see if anyone has any reccos amongst them.