If I was sure that they got some what deep rooted over the summer, I would not worry about them at all, but I have been hauling water to them for the past 4 months and with no other moisture in the ground, I don't think that they rooted too darn well. If they were JUST Concord plants, I wouldn't even bother, I'd just buy new ones in the spring, but these have a closeness to me.
Back 50 plus years ago when I was growing up, my small home town was an old Italian immigrant coal mining town back in the early 1900's, so when I was growing up these "old timers" were already retired and getting up in years. Everyone of these families had a nice sized Concord vineyard and they all made homemade wine. During my high school days, I cut grass for all of these families and can remember all of the grapes.
Back in 2007 it dawned on me one day, almost all of these old vines were gone and these were vines that were planted anywhere from 1902 to 1918. In 2009, I got my first clippings from one of the old 1902 vines and the next year, I found a couple of more old vines. I have these Concords planted in rows by family name, but if I don't get these things to grow, I might not be able to get more clippings before new families cut them out, so as you can see, it's save everything that I can right now. The last remaining siblings are now in their 90's and one guy just died this year at age 96 and another is now in a nursing home and he plans on selling his house soon. I just have an attachment to these grapes and it's not like I bought them at the local garden center.