Casey,
Seems like wine grapevines grow just about anywhere. The trick of course is getting quality grapes.
I suspect heat will be your problem. Vines tend to 'shut down' after about 96 degrees F. The stomata (little pores on the underside of the leaves) close up - effectively stopping respiration and photosynthesis. That doesn't mean you can't grow wine grapes, just means that you may not have the same growing conditions as somewhere cooler.
I have about 150 vines over here on the western sierra slope (western edge of the Tahoe Nat Forest). Around here, it seems to be too hot for quality Cabernet Sauvignon. Syrah does well, as does Zin - and there are some very good Cab Francs around. Too hot for Pinot and Merlot. My vineyard is syrah and Marsanne. Our biggest issue is the soil (lack of). I recommend doing anything you can to create as much soil depth as possible. Drip irrigation is a must - and don't be shy about fertilizing for the first few years while you're establishing roots and vigor.
One more thought - if you can find room for 20 vines, do. You'll be better served than with 10.
