My impression is that public U’s are most likely to have summer orientation since most students are instate and not traveling long distances. With 6000 entering freshmen it is easier that way. I still remember a family from Boston used their son’s summer orientation for a family vacation road trip to the Midwest. Unfortunately their van broke down around Chicago so they got a rental. UW has international students orientation/registration the week before classes start- less travel expense and the visa will have come through.