Piemonte! Our favorite place on the planet.
We have been there three times, all of them in the autumn. A great time to be there : harvests of all kinds (grapes, olives, pumpkins, truffles, corn, and many more) bring fresh foods to the table and seasonal fairs to the streets.
For an agriturismo in the Langhe : we stayed in 2008 at
Erbaluna, located in Annunziata. This is a lovely place with modest rooms and great hospitality. They have an organic winery, and when we were there the air was filled with the smell of grape must and fermentation, which we found delightful. While not being perched on a hilltop, there is still a fantastic view from the terrace, and the place itself is situated smack in the middle of one of the areas with the densest cultivation of vineyards. We also liked the fact that there was an option of a communal kitchen, where you could sit down and prepare a coffee or small meal at any time of day.
If you do decide to go there, I suggest you approach it from the east - entering from the west entails crossing a lane with limited field of view, and is a bit tricky if you don't know exactly where the entrance is. Also, check their website - things might have changed since we were last there, eleven years ago.
Our preferred sub-area in the Langhe is what is called the "Alta Langa". While all of the Langhe is stunning with its picturesque vineyards, we like the more hilly and forested area around Loazzolo and Vesime. The combination of natural woods and small-scale farms is a winner for us.
Wines are not a big thing for us, but the area is full of DOP wines of all sorts. There is also a huge variety of
local cheeses , and for us the
Robiola di Roccaverano is the jewel in the crown. It is a soft white cheese made of raw goats milk, and has a delicate texture and taste that changes with the amount of aging it goes through, and the seasonal pastures that the goats roam in.
Since you're going at a time of year that is chock full of festivities, you might want to look at
SagrePiemonte , a portal of festivals and events in Piemonte. Have Google Translate enabled, and the site is quite user-friendly.
Another resource that is useful if you'll be looking for trails, is the "Astigiano" topographical maps, a set of 1:25,000-scaled maps that are very good. I've attached a photo of one below.
And lastly, Piemonte attaches quite a bit of importance to the the promotion of local artisans. I've put up a
travel resource here on the Slow Europe site, on that subject. Plenty of small-scale producers of all types if you're interested in artisanal food, or other, products. You can search for them according to location and/or type of interest, through the various sites I mention there.
Have a great time.