This in from the ARRL
Refund Procedures in Place for Dayton Hamvention-Associated Social Events
Refunds are being processed for Dayton Hamvention-associated social gatherings, including Contest University, Contest Dinner, and Top Band Dinner. Each event has its own procedures. Those who signed up for the DX Dinner will be able to obtain refunds via PayPal. An email to all registrants will provide details. — Thanks to Tim Duffy, K3LR, SWODXA.