Go whitewater rafting, and you and your friends will likely hop into a large inflatable raft. These vessels provide a smooth ride over fast-moving water, plus the elasticity to bounce off half-submerged rocks. Rocks might do more damage to a hard-shell kayak, but the smaller kayak would be easier to maneuver in the rapids.
What if you were able to combine the two? Like an inflatable kayak?
They exist. They’re called “duckies,” and Scouts in Troop 53 of Mountain Brook, Alabama, got to try