I think most of the rides at PKI are kept in some kind of shelter. I know SOB trains, WWC boats, Express trains, and I think some HB rides arent kept in shelter but have covers on them. Even the cars/trains that are kept in shelter (most of them) have covers on them anyway just to go that extra mile to protect from the winter weather. Oh and also Racer trains are stored outside of FoF. I dont know, this might have changed but thats the way it was the last time I saw and that was in the middle of November.