http://www.flickr.com/photos/emersoncollegeflickr/10858743145/in/set-72157637673992844Lizzie Bright and the Buckminister Boy @ Emerson College. There are a few more pictures showing the boat as well as the giant whale that came out of the ground. Maybe it'll give you some ideas
At our high school we did ours from the front projected on a scrim because we had people doing things behind and the house being moved from SR to SL.
We put our teachers in it, Check it out
Tornado Scene- wizard of oz - YouTube