hi strohl
had friends stay in the asti/piedmont area near milan and loved it. seems people that fly to milan don't wanna stay, take a train to lake como, verona, venice where all the crowds go during summer. you can check out agrilacorte.com or somewhere near lake garda.
we spent 2 nights in bardolino on lake garda at hotel nettuno for their annual wine festival sept/oct few years back. it was fabulous, beautiful, right on the lake. you can also look at apartments in the lake area. hope you'll have a car to get around.
had customers come from udine, north of venice and always said it's gorgeous, come visit. not yet. they told me about farmhouse siacco di povoletto, north of venice. also check villacoren.com
we stayed and venice and took a prosecco road private tour, train to susegana or conegliano. that area is worth a visit, small villages, lush and green, small wineries with tasty "drinks", vineyards planted perfectly up the mountain/hills, great food in family restaurants with views along the way, no "commute" traffic like we're us too. haha
hope this gives you some info even though you're a seasoned traveler. check out agriturismo.net or booking.com may have things. happy "hunting"
aloha