Yes, they are plywood. I found a site with the old attraction poster and saved it to my computer. I printed it out and drew them from that. For the tombstones, I looked up photos of the actual ones from HM and freehanded them. All the tombstones are from scraps left after I did the ghosts.
Saturday97, I really debated between this and Nightmare but with Nightmare I wouldn't know where to stop; I wanted Jack, Sally, Zero, OogieBoogie, Lock, Shock, and Barrel, the Mayor, the vampires... It would go on forever! HM was much simpler!