[quote author=Snow_Dog link=1238671632/0#3 date=1238684259]Something like this?

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I've been using this one on my Prism for about 5 years now.  If you have any questions, I'd be happy to answer them.

This particular model has two straps that lash under the seat to hold it firmly to the tractor.  The two "side" straps attached to the back will need to lash to something roughly even with or slightly forward of the front of the seat.  (This isn't a natural lash point for the Prism with the slide-mount tractor seat, but by adding a nylon strap loop somewhat loosely around the slider rails in front of the tractor seat you can accommodate this issue.  I originally added "wings" made of short sections of conduit to the front chair support for this purpose ... the conduit fits the aluminum tubing just about perfectly... but this solution adds more weight to your canoe, albeit at the center of mass for a Prism.)  The seat also comes with two Velcro tabs and "belt loops" so you can secure the seat back to the seat when portaging (or parking for the night).

The downside of this design is that it doesn't work well as a stand-alone camp chair.  However, I sometimes use mine with a small folding (Coleman) camp stool.  The bottom straps go under the the aluminum tubes that constitute the stool seat and the side straps attach to the "U" of the front legs.

dd