I think this is correct. Kipu Falls is harder to get to now (due to property closures) than it was ten years ago (which is the last time I was there).
I believe that all of the opening sequence for Raiders of the Lost Ark, except for the parts inside the cave, was shot along Huluea Stream, which flows into Nawiliwili south of Kapa'a. Including Kipu Falls and the float plane shots.