Guided a trip down a West Clear Creek tributary for the Phoenix Mercury (women's basketball team). When we arrived at the main canyon we stopped to take a break. In the distance, up canyon, we noticed four giant pink bullet-shaped objects bobbing up and down above the vegetation. Couldn't see any people, just the rounded tips of those giant pink bullets. The bullets grew larger as they approached. Still no people. We started to make guesses regarding the size of those pink objects. Six feet? Eight feet? But they kept growing as they got closer. Finally we could see the four people, each with an inflatable raft lashed to their packs. The rafts towered over their heads. 12 feet long. They told us it became a hassle to keep inflating and deflating their rafts, so they left them inflated after they came out of the white boxes. Figured they'd keep them inflated through the red boxes. 20+ patches required as the vegetation poked holes in their rafts.