well it seems Schlitterbahn does have housing, at least for the main park. but its for international applicants so I'll give them a call
update: looks Like SixFlags has housing for the most part
Ah. I didnt have much fun going to this park in 2008. They shut down at the hint of thunderstorms, And if the chairlift is clogged there is a long walk between the two halves of the park with not many rides in between. oh and I watched SheiKra get stuck at the top of a lift hill in a thunderstorm at closing time no clue how they got the guests down.