We used the Alpacka Rafts, Denali Llama (Large model). They had a cruiser deck option and were specced with the ‘cargo fly’.
These boats are a superb design, fast, stable and easy to paddle. The cruiser deck was a little cumbersome pushing the buoyancy vest up around your neck but kept most of the water out, we also had 2 boats w the self-bailing floor which is superior in white water.
Alpacka Rafts are at the leading edge and were the originals made by the Tingeys' formley of Alaska and recently moved to Colorado, most others are copies especially the boat design. The Tingeys are still very active in boat design and almost all of Alpacas models have had a recent redesign.
The best feature by far was the Cargo Fly which is a dry zip on the pontoon which comes with ultralight dry bags to put all your gear inside and then zip up before inflating. This keeps your centre of gravity lower and keeps all your valuable kit out of harm's way, inside the boat. Of course, this was essential for this trip because the bow of the boats was occupied by bikes!