Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,872
You could leave the key and parking ticket in a bag with left luggage.
No need to use valet parking, who also require ID when picking up a car.