There will be 10 reserved parking spots all week in the Boswell lot across the street from the Miller Hall/Mason School of Business. That lot also has visitor parking spots; you pay through the Passport app. In addition, there will be 15 reserved spots at Kaplan Arena for the week. From this location it's about 5-7 minutes to walk to the business school. The parking garage next to Miller Hall does not have visitor parking nor reserved spots for the workshop.
https://www.wm.edu/offices/auxiliary/parkingandtransportation/visitors/parking/index.php