We spent a fantastic day with Mary in the Boyne Valley. She's the expert, and every detail was planned for a successful trip. We saw the inside of Newgrange tomb, which is included in her tour, had an excellent park expert talk about Knowth and we were able to explore independently, then finished with a visit to Tara. Book ahead and guarantee that you will have a wonderful day with Mary.
I had a wonderful tour with her a year ago, couldn't agree more. The Irish history talk on the drive up, starting with the Ice Age, is worth the price of the whole thing. Here's the website.
I have to assume that she doesn't go with the tour every day, but I'm sure whoever spells her does a good job. And the tour handles all the logistics.