I don't know how any of this applies to the original query. The OPer was obviously a neophyte and can't benefit much from knowing some hotshot has survived taking an inflatable over a 100 foot waterfall. Or that another hotshot who has paddled around the world once is going to do it again in an inflatable. I just checked Canoe and Kayak magazine and there are inflatables used in all kinds of dicey locations but they made tha magazine because they are far beyond what any of us is likely to attempt. All the inflatables advertized look too broad and ride too high for any paddling I am likely to do.

: 
� � http://www.seacanoe.org/inflate.htm� � � �

: A little hot air on inflatable kayaks

: "Most inflatables belong in swimming pools."

: � � � � � So sniffed Randel Washburne in his 1983 book, The Coastal
: Kayaker: "Some can handle moderate whitewater...Most can be
: guaranteed to float...But they will not carry much cargo, have
: little freeboard, will not track, and are abominations in
: wind."

: � � � � � Well! By 1989, Washburne’s view had warmed up a bit. In
: The Coastal Kayaker’s Manual, he admits, "Hawaii resident
: Audrey Sutherland has forced me to eat my words. This veteran
: worldwide coastal cruiser has paddled over 4,000 miles in Alaska
: and British Columbia alone, always solo and always in an
: inflatable. Her ingenious gear system allows self- sufficient
: travel for weeks at a time, and she regularly manages 20 mile
: traveling days."

: � � � � � I thank Audrey Sutherland for turning me on to inflatable
: kayaks. But most of my sea kayaking friends have all they can do
: to stifle their guffaws at the thought. And in the East, you
: can’t be a serious whitewater demon if you’re in a (snicker)
: "rubber ducky." Out West, however, whitewater paddlers
: love ‘em. Jeff Bennett sings their praises in his book, The
: Complete Inflatable Kayaker (Ragged Mountain Press, Camden,
: Maine, 1995). So now, inflatable kayaks even merit their own
: book, at least for whitewater, if not for touring.

: � � � � � Contrary to Washburne’s earlier claim, there are many
: inflatable kayaks now made to withstand the most punishing Class
: V rapids, as Jeff Bennett’s book shows. And in case you doubt
: whether the author is a serious whitewater paddler, check out
: the photo of him on page 109, in mid-flight half way down a 30
: foot waterfall - in an inflatable kayak, of course.

: and so on...........

: There is a literature discussing inflatable kayaks on the ocean.
: Read and make your own judgement. Here is one place to start