Security patrols motel and hotel parking lots for obvious reasons. Great Wolf did not build its parking lot for you, a non-paying so-called guest, to park and sleep in. Again, you would be trespassing and subject to arrest. It's also not a very safe thing. NOT a good idea.
If you MUST sleep in your car, may I suggest Wal-Mart? At least until very recently, and I think still, they are very accomodating to such practices, including RV'rs. And there is security. Do check with the manager first.
lets just build another campground.I really like camping,and sleeping next to KI would be awesome.