The couple times I've been there, the main section is just divided in half, with a basic groomed run on one side and the park on the other side. I can't find a video but from a pic I googled, it looks like the moguls were where the groomed run usually is. Not sure what the beginners do in that case, maybe they keep a section to the side groomed.
I'd love to try the moguls sometime but recovering from having my foot run over by an SUV so no ski boots for a bit. Thanks for flagging here though, I missed wherever they publicized this...