I should clarify - at the cabin - if we have no power, we have no water. It's the same problem in our principle residence downstate which is why we got a generator here.
We don't plan to get a generator at the cabin. However, we know that power outages up north and rural can last a long time before power is restored. This happened to us in the fall before we shut the cabin down - an extended power outage and temps below freezing at night. We did a run up there to drain and shut down the water.