Let's start with the worst case.
I told Cliff the other day I was going to move my tomatoes to an entirely different location next year to get them away from the blight, and he suggested we move the whole garden. At the time I said no to that plan, but the more I think about it, the more I think that's exactly what we'll do. That will leave only the strawberry patch in the old location and give fresh soil to everything else.
There is no plan that will provide me with zucchini, but I know from past experience that I'll get some tomatoes and potatoes out of the deal.