t’s sort of like sitting in the back row of the expensive seats. Nonetheless, there it is – if one squints hard enough at a good size map of the Napa Valley, you can see Hestan Vineyards, the 41-acre vineyard that belongs to Stan and Helen Cheng. For a closer look at the vineyard, which is located in the nether-reaches of the Napa Valley, you’d be better off with a map of Suisun Valley or of Solano County. Because Hestan’s parcel, from where about 5,000 cases of Cabernet Sauvignon, Merlot and Syrah are sourced each year, is far closer to the northeastern San Francisco Bay cities of Fairfield and Vacaville than it is to the town of Napa.