U Idaho has Parent orientation, and which session they attend depends on their student's living choice. There is one for sororities, one for fraternities, and one for residence hall and off campus living.
The parents even have their own section on the
www.uidaho.edu homepage, which I and my parents found truly bizarre when I became a Vandal. They couldn't believe the personal phone calls and welcome letters, or the continued invitations to campus for Dad's and Mom's weekends. The Parents' Association is very active though, which has been good for certain extras not in the approved state wide budge (the now defunct VandalTaxi).