Well put Heidi! Carole, both of Heidi's mare foaled approx a month early this year, just to be different from nearly all the other mares on here - I think they did it because they heard Heidi talking about marestare, and they wanted to prevent us Aunties having the pleasure of all the chat that we do while patiently watching for babies to arrive! LOL!!
Carole, I never really bother too much about dates/days, I have a covering date and simply 'call' the due to foal date as one month before (11 months) to give me an approx idea. I then watch the girls closely and as soon as they show any signs of gettng an udder (which is normally 4 weeks approx before they are due) they are stalled at nights and watched. In all my years of foaling mares I have be very lucky in that they have all had nice full udders showing before they foaled, plus most of them have followed another of the 'getting closer to foaling' signs by having an udder that has not reduced in size/feel after a day out in the fields. That fact, plus the other 'close to foaling' signs that I also watch for, gives me the clue that there will not be long to wait before I will be welcoming a new baby.
With or without a camera (and I only had cameras a couple of years ago) the mares are seen and checked by me or my daughter several times every night from the moment they are stalled at night - we have never relied on just watching a camera, preferring to get outside with the girls, giving more hay where necessary and clearing up any droppings to keep the stalls clean incase they should suddenly foal. My girls really love all this night time activity, they like the company, enjoy the scratches and the attention and become very relaxed about having us pop in and out which is very useful when it comes to being with them at foaling time. Once they are close to foaling we camp out with them with enough coffee, tea and nibbles to last the night as this is the ONLY way to be present as the early stages of labour start, giving you the chance to make plans (notify the vet) should something look/seem wrong early on, or if all goes well, to be there to make sure the new baby clears the birth sack quickly if it doesn't 'break' immediately.
I'm really looking forward to seeing the pictures of Trixie - I'm sure you know the requirements, down at Trixie's level, one from side on, one from the rear, one of her udder and one of her udder from the rear with her tail just moved sideways - so that we can see how she is progressing and try to help you get this baby safely delivered with as little stress to your good selves as possible!