[Tagging] Car storage areas at ports?

[Dave F.]

Hi

I cycled passed Royal Portbury dock which a major car import port.

http://www.openstreetmap.org/?lat=51.48084&lon=-2.72515&zoom=16&layers=M

If you view with Bing background you'll see there are large areas for 
storing these cars before distribution. Is there a better tag for these 
other than 'car park'? If not what would be the best sub tags to add to 
them other than access=private.

Are there any examples I can copy?

Cheers
Dave F.