There are approximately 50 wineries in New Jersey and the wine region dates back to 1750's when the Renault Winery was founded. They had a lot of trouble growing vinifera due to black rot, downey and powdery mildew. It gave them problems until the middle of the 20th century. Then came some changes in agriculture chemistry in the 70's and that changed as they were able to tackle the issues at hand.
Today there are three AVA's in New Jersey. The Outer Coastal Plain AVA which is South Jersey area established in 2007, Warren Hills AVA established in 1988 and the AVA they share with Pennsylvania, Central Delaware Valley AVA established in 1984.
There are a few wine trails throughout New Jersey. The Garden State Wine Growers Association lists them at http://www.newjerseywines.com/wine-trails.html and there is also another website I found Vintage South Jersey http://www.vintagesouthjersey.com/page.php?page=trips-and-trails/main that lists some of the trails in South Jersey.
http://www.amaltheacellars.com/index.html
Both the Garden State Wine Growers Association and Amalthea Cellars can be found on Facebook and Twitter.
Hope you enjoy the podcast.