Don't think you'll need to worry about safety. I've had my old cat down some of the hardest whitewater in the US. Fully loaded boats AND whitewatering at same time. Boat has hit rocks, trees, posted tubes on pointed sticks, hit carbodies, you name it. You're about as safe, if not more safe, then most of the boats out there if you have a quality boat. So, don't worry. Just have a good PFD and you're set.
"Good angling ethic is not a monopoly practiced just by fly fisherman" - Bill McMillan