Grab a rustic piece of wood and screw in some hooks. We found this moose one at the dollar store and used it for the main hook in the middle.
Wrap a piece of rope around one end of the wood. Secure it to the top edge of the board with a nail and then tie a tight knot over the nail head. We used a wood burning tool to burnish the cut end of the rope so that it would not unravel.
Attach some picture hanging wire and hooks to the back and you're done!