Huh. We had a perfectly fine tour experience at CMU. No tech problems and our tour guide was enthusiastic and informative. Other than not seeing the dorms (which wasn’t too unusual), DD felt like it was a comprehensive tour and she had enough information.
That said, we were within driving distance and went during the week when DD didn’t have school because of a teacher inservice day. The group that day was also very small, probably thanks to winter weather. I don’t think there were more than 15 people in our tour group and 50 in the auditorium.