A collection of interesting links to art-related tents and their uses...
http://www.bobestrin.com/artshow.htm#menu%2011
An in-depth US based guide to selling out at fairs etc.
It goes through all the technical things you might need to know and things to expect.
This is a more 'typical' use of tents for art - coming more of a selling 'booth'/shop space.
http://weemadfest.wordpress.com/category/participants/clare-galloway/
The Secret shop doesn't seem to have a website anymore, but this Bell Tent has a wonderful shape.