Ok Slaughter, I will try to give you a few pictures. It is not very advanced.
First you take any stuff that is soft and won't get damaged by either water nor the weight of a human body and put in the front seat. I use a couple of big tarps and some other stuff. Then you fasten a Hobie trampoline above. You need to add a stick in the front end and tie it to the akas or to the pipe between them. In the other end of the trampoline you just use the ordinary clips of the trampoline. Put the trampoline assymetrical and you will still be able to reach the controls on the right side (you might have to take away the steering control on the left side). A sleeping pad is highly recommended, as you will get wet and cold without one.
If you´re tall you just take away the peddles in the rear seat and put something there to have your legs on. You can also turn your body 180 degrees if you want to look at the opposite direction. It is easy to sit up. You might lean against the mast if you like to.
Of course this is just a crude solution. I would like to have a trampoline which is especially constructed for this task.
Here follows the pictures: http://s1314.photobucket.com/user/gcraf ... sort=3&o=3