At this stage, they are stalled 24/7 under the camera unless I am home and outside. Tomorrow, if they do not look like they'll foal, I'll turn them out a bit while I'm out in the barn. But it would be pointless to have these cameras and internet feed if they weren't stalled where we could see them. I'm more concerned about making sure that the foals arrive safely and no one receives trauma or is lost during the process than I am regarding any exercise for the mares. Unattended mares are a receipe for disaster.
I appreciate your concern though.