Both their Rafting Adventure Ride and flume ride are positioned next to each other. Cedar Fair noted this and the uncanny ability to soak their guests to the bone. So they used their brains and installed cheap lockers nearby as well as used the basement level of a building (that would have otherwise been storage) to house a changing room for their guests.
Maybe other parks should take up this thought process. And as I noted from several of the visitors at the park; bathing suits were welcome on these two rides.
Walt Disney World's Magic Kingdom
Disney's Animal Kingdom
Disney's Hollywood Studios
Disney California Adventure
Universal's Islands of Adventure
Universal Studios Florida
Universal Studios Hollywood