I've booked something. It will be after his big work thing is done. So he has no reason not to step up and be the default parent for a few days. And if he declines or refuses or is otherwise difficult, I will make other arrangements and let that factor into my decision as to whether to continue the marriage. I'm not setting it as a hard deadline for making a decision on the marriage - that will come when it comes - but I am using it as a goal for myself. By that time I want to be in a much better place, and capable of emotionally taking care of myself no matter what he is up to, and realising this period is as much about me deciding if I want to R as it is in me waiting for him to make a decision or have the capacity to R.
