A selection of childrens' theatre companies - travelling around the UK in schools and communities...
http://www.sokobauno.com/index.php?pid=96
"The live music for the show is created from the entire circus structure, it's props and staging become the instruments as Invented musical machines, and kinetic contraptions are plucked, strummed, banged and blown by the performers to produce an ever so wonky circus soundtrack."
A puppet theatre on a barge, currently in London.
http://hobgoblintheatrecompany.co.uk/
Jigsaw Theatre Company, Australia: http://www.jigsawtheatre.com.au
Looking at other projects that have used tent spaces, or as a focus of a project...