Can I keep wacko babysitters from the child exchanges
It's a 'free' country. It'll be easier to control how you react than it will be to try and control who she brings to the exchanges.
On the vacation announcement.....
I was looking at the calendar a few days ago and realized I was taking the kids out of town for a week in 10 days and haven't talked to the kids mom about how I was leaving on one of her days so I emailed to ask/notify her. I didn't really ask but apologized for the late notification and told her I was and was open to whatever suggestions she had to make it right. We worked it out and then she told me that she didn't have sitters arranged for the kids this summer and wouldn't be taking the kids all at once. She wanted to get them individually a week at a time over the summer.
That creates some challenges for me but, well, it is what it is. My feeling is whatever I can come up with is most likely a better solution than whatever she can come up with.
I know you are not even divorced yet and there are a lot of raw emotions during that time but the bottom line is that you guys are going to have a much easier time over the next decade plus if you can both be flexible. I know that is a two way street and it's not always possible but like Bear Grylls says, Sometimes you must eat some poo.
It's better to willingly eat a little than be force fed a lot. Hopefully, you guys will get there.