ZedHarvest was created for Killing Floor 2 with a specific goal in mind. I wanted players to have access to an area that was the best place to hold out, but force them out of it and make them find there way back.
With that I made ZedHarvest a corn maze kind of map where the center is the biggest and most open area. Then I put 6 separate maze paths stemming from it that each lead to a trader.
So at the end of the wave the players have to go to the trader through the maze and try to find there way back to the center.
there is nothing hindering player movement in this level and all the zeds spawn within the corn rows.