Well your right kidney.
Pack your patience.
You can sign up for their emails but basically booking direct is probably your best bet. We always have. Both them and Great Wolf Lodge make it pretty tough price wise to book anywhere else. And they don't really work with travel agents.
We always added the Tom Foolery passes.
One thing we used to do at Great Wolf Lodge is spend one night there and then one night very close by. Would save us hundreds of dollars because you can still have access to the water park until close on the day of checkout. Won't lie the time I stayed 2 nights was more enjoyable but had a killer deal.
I would think Kalahari is the same but haven't verified.