in the 80's myself and a group of various friends windsurfed from the train at the broadwater to wellington point 3 times, our longest time was seven hours, our shortest was under 5.
a bloke called wolfgang circumnavigated south stradbroke island 'solo' from dawn to dusk.wot a crazy kraut.i seem to remember he celebrated with a big joint.
and steve mc geary and his mate whose name i cant remember windsurfed from wellington point to moreton island and then to margate on a good southerlyin the same day with no support boat!
all of these feats shold be kiteworthy, just get agroup of friends together.