In order to determine if the other institutions were interested in particpating, you will have to reach out to someone at the institution who likely has some knowledge about open education. This will usually be someone in the institution's library. The easiest way to do this is to send a quick email but then the question is-who do you send the email too? What job titles should you look for? Here are a couple of suggestions:
A university system-wide event will have a lot more moving parts because more stakeholders are now involved. While some Open Education Week events can be run soley by an OER/Open Education Librarian, it is not recommended to plan a system-wide event alone. After determining interest, the next step will be to form a group to plan the event if a group does not already exist. As you are forming your group, keep these questions in mind: