I can understand your worry, however, it may be a blockage, and yes I know you cannot get to a vet right away due to weather, but forcing the issue by adding some roughage may do more harm than good. If it is a blockage, maybe a small bone, or a piece of puppy toy you didn't notice, or even paper, you can damage her internally by forcing it to pass.

I would keep her on a very light diet, broth made form bones ckn backs etc. and some rice WELL cooked, that will lessen the amount of actual stool being produced, and also not stressing her tummy. You may want to inquire about home visits by your vet, our vet will do them for an additional trip charge. I would worry less about her pooping in her crate and more about finding ways around the weather. I know how awful and helpless you can feel when the weather wont co-operate. We are having and Ice storm as we speak so I am not being awful just trying to be helpful.