Is the desire is to right the boat without getting on the board at all?
I'm not sure that is acutally possible. Dreamland would be to hook on in the water, put two feet on the hull and push out. Boat comes up so far then then pull that rope until hand gets near the rack.
This may require some re-writing of physics, and then some real magic to make the line vanish. Ideally to use this I would have to collect the line from somewhere near the bow (floats lowe than stern) and the loaded end would tie to the rack near the shroud. I'm guessing I'll post some pictures after I've tried it.
Once we get going into the season there will be no need for any of this as I will be fitter, lighter and more mobile (and hopefully we'll swim less when the job actually tacks).