We just planted 20 more Pinot Noir. We space them about three feet apart, just like the photos of my vineyard in my journal. The gophers got about 10 of our three year old Pinot's so new 1 yr old plants are going in as replacements. The ten extra Temperanillo and Chardonnay will go into pots for any others that may need replacing over this next year.
Yes, you drop any developing fruit for at least three years. This allows the rootstock to gain a foothold. This is also why, during their first and second and sometimes third year, you cut the entire plant back to the first visible bud above ground on the rootstock in the spring. Don't worry - they grow again!
We also have table grapes, and we follow the same process as the wine grapes.
I just walked our acre of grapes and see that most of them have some frost damage. We technically didn't get to 32 in the last two weeks, but its clear that at one point the temp was low enuf to crinkle some of baby leaves and buds. Our last frost date is May 20th. Keeping fingers crossed that nothing will happen in the way of low temps again.