I intend to paddle with a single blade, if and ever I get out to solo trip, but I've read about the pros of kayak paddles. They seem clearly ideal for a narrow solo canoe, but can they work for something around 36" wide? Most double blades I've found for sale measure 215 - 240cm. Assuming I'd need longer, would 240 be long enough? I'm 5'5" kneeling in a tandem, with the gunwale width in the neighbourhood of 34-36". This is all new to me. Any thoughts? Thanks for any help.