How do you decorate a sheep pen?

I am getting ready for my first airing at Art in the Pen on Saturday and Sunday 13/14 August in a cattle market in Skipton.  I have decided on the designs I want to exhibit and am firing up the kiln every evening.  My big dilema is how to make the most of the space provided.  I have a 2m x 3m space with a rough concrete floor and big metal gates on 3 sides.  Suggestions welcome for turning this space in to a glass gallery with white backgrounds everywhere and on a low budget.