P: Export multiple collections at once to their respective target folder.

I'd like a feature in Lightroom that can export Collections at once.
I do large photoshoots (for schools, etc), where I make a collection for each person.
Then I would like to export the collections at once (so I can leave it running, while doing something else), and the exported folder structure would mimic the collection structure, eg:
{export path}/{collectionname}/img_1234.jpg

And the same idea for the web module, it would be time saving to export collections as different folders at once. Now I have to do it one by one, and it's a PITA for 2-300 collections.

Any idea?