We can't draw artboards in whatever shape we want.
One layer is bleed, one is guides and safety.
Draw bleed around your crazy shape - copy and past shape and make it bigger. It doesn't have to be exact, just bigger. Do the same for your safety. This means we can lock, show or turn off.
crop marks - these go in the bleed.
do NOT do this front and back. Just don't. Just put something not important on the back.