we are not really 'big water park people' but we do enjoy them when we occasionally go, which is once every year or so. However, in all of our years at WDW, we have never taken the time to do a water park there. More than dying to go to the wp, I think we feel like we have missed something by Not going... I am honestly not sure that one morning at wp is worth $250 though. That may have just answered my question. When did those prices get like that? I am already dealing with the PH price increase, which I really only use for dinners. I may need to rework my plan for one or the other.
SAB would definitely be easier, especially as I envision not seeing the teenagers the whole day once we get to the wp, and Ds9 will constantly be wanting to catch back up with them.

I am also intrigued by the big slide at BWI. I actually prefer the colors and theming of that hotel. I guess we will see what happens if discounts ever come out and I can get a better rate at one vs the other.