Don't give up all hope yet!
I went in 1999 with my band (as a member of the Color Guard and Choir) We marched in the MK parade, got a tour of the utilidors. That evening we went to the TTC, and took a bus to a large building near to DTD. There we were able to get changed, warm up, etc, then we walked across the street, and the Chior performed on the stage across from the WoD store. (This might be the place you had your workshop, since it is not in a park) We personally had our workshop in Epcot, in a room in the back of Italy. There the band learned and recorded a score to Aladdin, which Disney put to the actual movie, and gave us a copy.
I'm sorry this is so long, I hope it helped, though.