Use brittle crates, and then make the Dragon crawl underneath.

(If you know anyone with a restaurant, liquor store, or small market, you should be able to borrow enough "structurally sound" crates to do the job. I'd suggest you "temporarily requisition" them from the nearest loading dock, but then you might get caught and the Dragon would be watching your TV and throwing snacks to your kids while you awaited arraignment.)

In my highschool days I used one crate to hold up full size dirt bikes while I worked on them. I'll admit that when you threw a 4-stroke up there on a hot day, you'd better work quick or the crate was going to start sagging, but with plywood and enough crates to populate the entire area under your set, you should be more than fine strength wise.)