I read an article some years ago that Lin and Larry Pardey had a sculling oar made for Taleisin. They had it custom made and brought it back in the hold of an airliner. As I remember, it was waaay long and had a long thin 'paddle' section for flexability. Taleisin is not a lite boat...so it must work.
I'm not THAT much of a traditionalist and I'm lazy, so I'll be firing up the iron genny thank you very much.