We'll be going to LEGOLAND, Sea World, and the San Diego Zoo in addition to DL. I prefer disposable type Dollar Tree ponchos over getting soaked on Grizzly River Rapids. Are there any rides where you get drenched at any of those places? How many ponchos will I need?
One of the wettest rides we've ever been on was Pirate Reef at Legoland. It was like having a giant bucket of water dumped over us. Way, way wetter than GRR or Kali.