single blades work fine if the boat is designed with a narrow gunwale station like the RapidFIre is.
Most "pack canoes" have flare all along the hull rather than shouldered tumblehome so your assumption is mostly true. Hornbecks do not have shouldered tumblehome.
The Rapid is only 24 inches wide at the rails. Using a 46 inch Fox Works bent shaft is fine. The other hiccup of course is that it can be hard to find stock bents that short.
The Canak still has lots of deck and a what appears to be a heavy seat.
PFD's (Life Jackets)
Pull-Up Strap Handle Kit
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