Overnight parking is allowed at the Ten Foot car park in Cobh, subject to paying and displaying, 7 Euro for 24 hours.
AFAIK the management will let you stay overnight at the waterworld pool complex at Claycastle in Youghal if you are a customer.
Also the carpark near the Jameson centre in Midleton is often used for overnight parking.
Youghal itself still does not seem to have any place commonly used for overnight parking,
Wild Camping would not be appropriate at any of the above locations
