@dustypig, If your daughter is doing IB Visual Arts, then that’s more than enough. In that case, I don’t see that she would have to take another course outside of her high school.
Art conservation isn’t commonly found as an undergraduate major. (It isn’t at Williams, though there are classes offered in the art department.) The undergraduate programs at Scripps and Delaware are exceptional because they are rare.
I wouldn’t worry too much at this point about her eventual career path. That will sort itself out as she gains exposure through college courses, connections, internships etc. In choosing her college, she should be thinking about whether she wants to attend an art school or a “full-service” school where she can can study art and other disciplines as well.
The integration of technology and art is a growing field offered at many colleges in different interdisciplinary combinations. The BXA programs at Carnegie-Mellon are notable; there are others like this.
http://www.cmu.edu/interdisciplinary/