We actually just made a reservation (on Monday) for the Great Wolf Lodge in Wis. Dells - a plain 2 queen bed room for $119. We are staying Sunday August 29 and Monday August 30.
The rate was on their website - but did my reservation over the phone. The ressie person about jumped out of his shorts when he realized that - yes - there really was a rate that low.
We were deciding between the Kalahari and Great Wolf, and originally only for 1 night. The really low rate is what prompted us to do a 2-nighter.
edited to add:
We've never been to either the GWL or the Kalahari, so I was glad to see some of you previous posters liked it!