Whether the administrator is school-based or private, he or she generally must be certified as a school psychologist (by the state DOE), or licensed as a psychologist (by the state board of licensing), or, in certain largely clinic-based situations, operating under the direct supervision of a person who is properly certified or licensed. (In the last case, the administrator is almost always master's or CAGS-level trained in his/her own right, or finishing up a doctoral internship.) It is unusual for there to be any problem with examiner qualifications for a school-based cognitive assessment.
As more than a decade separates the age of the norms, the WISC-IV will probably be a bit inflated (read a bit higher than) compared to the WISC-V. Both instruments are excellent, and are likely to be better representations of your daughter's true capacity than InView.
I would not worry about preparation. It is designed to be taken without any preparation other than the common-sense ones, such as being well-rested, fed, comfortably clothed, and relaxed. There are a variety of tasks, and a range of difficulties. It is normal to find some items easier and others more challenging. She should just try her best on all of them.
