Thanks for the many response on my thread about double towing, I decided on a canoe and setting up my jeep to carry on top, would rather towed behind Jeep but since the laws are all over the place carrying the canoe is a better choice for now..
Just to let you know my canoe will be powered by a Lehr 5hp propane motor, the motors are new on market as of last year 2012, uses the small green propane tank like your portable grill or heater..
Here is the website..
http://golehr.com/wp-content/uploads/2013/04/banner_08-960x500.jpg