Where can I find vin santo?
You might want to call ahead to whatever Sam's or Binny's location you're planning to go to, to make sure they have it for you in whatever quantity you need. Since their website has it, they probably have it at their warehouse but not necessarily at every one of their stores, but I'm sure they can get it for you at any store if you arrange for it in advance.
Sam's is more of a specialty wine store, well-known in the Chicago area. Everyone knows where to go for wine, and Sam's is it. The store in Chicago is the big, original one; I haven't been to their other locations, so I don't really know anything about how they compare.
Binny's is more like a traditional big liquor store chain with a big wine department.
Watch the weather reports; if the overnight temperatures are going down well below freezing, you probably don't want to leave the wine in your car overnight!
Vin Santo and biscotti is a wonderful dessert, and I guess lots of us have acquired the taste in Tuscany. I have no idea about the rules governing wine sales where you are, and of course here in California wine is available everywhere all the time, but I've gotten Vin Santo at Whole Foods.
Wine/Liquor can be purchased M-Sa, but no Sunday sales. We also cannot buy alcohol over the internet/telephone, etc. unless you're a wholesaler. Finally, no Whole Foods here in NE Indiana- we have big-box grocers like Meijer, WalMart and Kroger and a few local health food shops.
I did a search on Sam's website and found two selections:
Cantine Baroncini "Il Santo" Vin Santo, Toscana NV
San Felice Vin Santo del Chianti Classico 2000
I did a search on Binny's website and found five selections:
Villa Puccini Vin Santo
1994 - Avignonesi Vin Santo
1999 - Badia a Coltibuono Vin Santo
1999 - Poggio Bonelli Vin Santo
2000 - Geografico Vin Santo
Binny's Beverage Depot
FWIW, I had never heard of vin santo. According to Wikipedia, "Vin Santo (holy wine) is an Italian dessert wine. This traditional Tuscan wine is made from Trebbiano and Malvasia grapes, and is typically very sweet." More: http://en.wikipedia.org/wiki/Vin_santo