First of all, I can understand your comment about having some time away from your kids. I think it's normal, and you don't want to be a helicopter parent, hovering over your kids all of the time. But that being said, your kids are being raised in a cult, so a little more than average hovering is probably a good idea. So why not split the difference between what Billy and Cagefighter said?
How about neither kid goes to the week night meeting or field service, and both attend the Sunday talk? Help her get them ready for that, and you'll still have your alone time. Of course, all the while, you should be teaching them TTATT and critical thinking skills.
If they were my kids, I'd take the hard line by giving their jw parent copies of the Candace Conti verdict along with other evidence of the Watch Tower's filthy record on child molestation and forbid them from being around jws without my supervision. But that might be because the elders and my jw mom protected my molester when I was a child.