That's of course possible, but a double kidnapping in broad daylight under these circumstances, just doesn't seem to have any precedent. I agree with your second part though, this would have been planned in advance, and they knew exactly what they were going to do with the women.
What hurts here is the rural are in which this occurred, which limits the opportunity to recover video evidence. What helps however, is the fact that you have a solid starting point with which to look. People and devices talk, and physical evidence can also help.