In my position there would be no way to minimise the collateral damage. I sympathise with your position. But I agree with Matrix, you are giving her a special memory. I could not bare to leave my family or partner to make even to make it easier on them. Call me selfish, but I know without them I would no longer be able to push forward. Part of me hopes some miracle might happen to fix things.
The people in our lives deserve our time, as much as we can give them anyway. This trip will stay with her forever. I think of the people I love, and I would want them to share these moments with me too. The worst part is we can never actually say goodbye. Most people would not understand our decision. So, we must say goodbye in other ways, by giving them the best of ourselves, by settling any lingering disagreements, by loving them the way we wish we could continue to do.