Do me a favor. Take a picture standing behind her looking toward her head, and squat down right at her level. Then, take a full side shot right down at her level. And if you can, let's see a picture of her udder -- although that's not as important.
When is your trip? If we see some pictures, we should be able to see how baby is laying and where it's positioned, to see if its moving into position for delivery. She will become slab-sided as baby lines up, so we should be able to "guesstimate" where she is in regards to if baby is ready and lined up for delivery, and help you save some $$