Another location to look at, especially with a little one - Glacier Canyon in Wisconsin Dells (6 water parks, 3 inside & 3 outside on site; very large lazy river and a large toddlers play area/splash pad plus much more).
Also, take a look at Last Calls in RCI - cash only, typically out of season locations but can be great values. We went to Massannutten (VA); booked for a week for something like $300 but only stayed for a long weekend (as we had planned). It was still much less than a decent hotel would have been.
Not to steal this post but glacier canyon sparked my interest as we are looking for some different and new places and this is only 15 hours from us driving.
Is there a time of year to avoid? I assume it’s pretty cold there in the winter. Are all the activities included with your stay (bumper boats, go carts, water parks, etc) or is there extra costs? The club looks great. There’s so many great places but I also like going back to our favorites, it’s so hard to choose.