Width: 33 in.
Depth: 17 in.
Height: 67 in.
So, I figure we basically have one big baseplate deep (15″) by 2 wide (30″)
So tall and narrow. OK. How about the Death Star “Princess Leia rescue scene” from Episode IV? Construct tall shafts with openings at multiple levels. Vignettes could include Obi Wan disabling the shield generator, C3PO and R2 in the control room, Luke and Leia escaping the stormtroopers, and even the stormtrooper hitting his head on the opening door.