> 1) I read that Greenland paddles are suited to narrower boats
> with lower decks. Having said that, would a Greenland paddle be practical
> for a high volume touring kayak with a 24" beam? If so, how much
> would one add to the length of such a paddle to compensate for the
> wider beam? Any suggestions?

I use a greenland paddle on a 16 ft 24" touring kayak and its OK. Length is 8ft , I am 6 ft tall. This measure should be OK for you as well.

> 2) Is there such a thing as a storm paddle designed to be held
> at the very butt ends on alternate strokes, almost like a canoe paddle?

Noi, but I hold mine on the tip for large sweeps and for eskimo rolling. Any greenlander is made for this purpose.
> Has anyone tried this?

>