I'm going with a carnival/funhouse theme in my garage haunt, 12-year-olds only to attend. Funhouse mirrors, one a two-way where a scary clown appears. Rickety floor, blacklight dot room with moving walls, maybe cotton candy cocoons (one quivering) like in Killer Klowns movie.
Haven't been able to figure a way to tie-in the front yard decorations. I have a steeply sloping yard with no trees, but lots of bushes in front of the house.
I have a bunch of wig heads with blue LED eyes from last year (they were draped in fabric and cheesecloth for a ghost army), floodlights, light strings, and two 7' tall free-standing, lighted ghosts that could be remade into something else (clowns maybe?).
Any ideas? I prefer to build, not buy - I have more time than money - fair artistic skillz, better mechanical skillz.