I did a similar set of oversize skis, and cut the two skis and left some tabs of wood between them.
I then soaked them and used a wood form to bend the tips up. Then soaked the tabs between to
and put them in another jig to give them a nice V shape.
My tow line ran from the boat to the first connecting tab between the two skis.
This kept the tow point low and prevented the boat from tipping the skier forward over the tips.
The line was then run up to the skier's hands to look like he had a good hold.
At the back of the skis I had a brass rod that hung down and back at about a 30° to keep the
skier pointed foward.
After I had given away the speed boat, I added some clear acrylic wings to the skis, so that I could
then tow the skier behind one of the tug boats. The increased surface area makes the skier plane
nicely, and no one really sees the clear pieces while he is in motion.
