The Casanel label includes a drawing of the cabin that sits behind the tasting room with a family seeing their father go off to war. The cabin was built in the 1700s, so it is very likely a scene similar to this occurred a some point during the war. The drawing was done by a local artist.
27 wineries are participating in this event. The passport books contain descriptions of the participating wineries along with information about the wine used for this promotion and nearby Civil War Battlefields to visit during your trip. There is a place in the passport book for stamps, but there does not appear to be a prize for getting the stamps.
As for the wine. The 2008 Cabernet Sauvignon, which is available with the Civil War label and without, is 90% Cabernet Sauvignon and 10% Petit Verdot. It was aged for 10 months in neutral French Oak. The wine has aromas of blackberry, black raspberry and plum. It has a nice oakiness to it and firm tannins that create a whole mouth feel which is followed by a lingering finish. It is a very good wine of which the team at Casanel is, rightfully, very proud.