Luremaker - Yes grapes do need good sun. The shot below is looking south. All trees to the left in the picture(east side, another 3 acres) are being removed to get in early morning sun for quick drying of morning dew. On the west side I'm planting an early ripening variety such that a little late day shading should not affect it much. In recent months I've been meeting growers in the Beamsville Bench, Niagara-on-the-Lake, and Prince Edward County areas to discuss cool climate viticulture. They do a terrific job with viticulture and winemaking such that many of us down in cooler areas of the eastern US have much to learn.
The bigger rocks I bury below 3 feet and the smaller rocks end up in my currently ugly windrowed stone walls on the edges. Stone walls can look terrific but require more work than I can devote at the moment. The invasive plants seem to take hold quickly in the rock walls.
Hope you can get back to your project before full Winter sets in. I probably have another 2-3 weeks open to complete the current phase of work. Next Spring I will de-rock another 4-5 acres to get it ready for planting in 2014. Good luck on your project and look forward to more photos...Cheers, Gary