I guess it won't let me edit...
Anyway, I have used Creatures and they are very nimble just like a catboat. They ferry across waves and boils with ease. The uprights do cause some sway, but not enough to negate its function, and actually can create stability. It does get caught in the wind, but that just makes you stronger at the end of the day. I like to look at CC as another tool in the shed.
They do open doors to unraftable rivers and they don't weight 300 lbs. I would guess 150ish... Fact is, nobody rafts the Illinois at 20k CFS because the last people to make the mistake of getting caught there at 17k in a raft died or took a helicopter ride. Nobody rafts the Cal Salmon at 10k because you have a very good chance of dying at 7k. The same can be said for every single high water trip the Creature Crafters have been doing.
I was on that Illinois trip and it was manageable, but it taught me to scrutinize peoples experience 10x over when compared to normal rafting. In hindsight, I would say 3 people on that trip had no business being on the water that day. I will also never run a setup with my paddlers in the rear, there is nothing for them to grab on to, so they can't pull themselves up and then get waterboarded. That said, I would go back in a heartbeat and look forward to the next chance I get to the see the Illinois at high water.
If a CC gets stuck in a hole, chances of a raft making it through are slim to none. I have done my fair share of rafting and swimming as a commercial guide so I am speaking from experience. In my professional opinion, the eddy fences would kill on all of these flooded runs.
This video shows that having spare paddles to grab on the upright makes a huge difference in comparison.
Come to Tumwater this weekend, it will be a moderate 5000cfs and a great chance to see the boats.