As someone who is stuck on campus giving tours all summer, I have to agree with what everyone here has said. Tours bite when families don't ask questions or even respond to what I say I any way at all (Heaven forbid).
I remember my tour for Beloit (where I am now) quite well. My tour guide showed up late and only briefly showed us part of campus. Then his next class was the class I was going to sit in on, so he asked me to tell the Prof that he'd be late. Quite unnerving for a prospective student to do!
My tours of Harvard and UWEauClaire were WAY worse. At the Harvard tour, my guide kept asking me questions about what I did in high school, what my grades were like, etc. and I couldn't ask any questions of my own! When I did, they were ignored. At UWEC, the guide was nice, but just really really bland. I don't expect to be entertained every second of the tour, but the guide could at least have pretended to like going to their school!
But Beloit College tour guides rock! If your friend is ever in WI, send her over here and I will personally give her her tour! And it *will* be awesome!