I'm waiting to hear whether the online university I teach for will cancel its annual commencement. Thousands of students, faculty, and families travel to this event from all over the globe (literally; there were people from as far as Guam and Africa there last year). I know the Provost is waiting to make the call because he's hoping it will all be over by mid-May, but, meanwhile, people are making plane and hotel reservations that may not be reimbursable. This is not the time to be wishy-washy. Make a decision and stick with it.I don't know that I subscribe to that theory in this case. See my comments above about good/poor leadership. I have a bad hunch many people are going to travel to things only to arrive and find them canceled at the last minute. Once you have traveled, most of the potential for damage has been done ... anything you tracked with you has spread, and anything you've been exposed to is going back with you.
Large gatherings enhance the opportunity, but people moving about is what causes the spread.
Best of luck though!