I was wondering when I would hear that question. I think I will wait untill my warrentee has expired to try that.
I am a Proud Prius owner 2002 and know a lot about them.
The Ford Escape Hybrid and Lexus RX 400h have towing capacities of 1,000 pounds and 3,500 pounds respectively. this came from
http://www.hybridcars.com/faq.html
If you can afford them gem them Lexus 400 and Toyota Highlander Hybrids are now out and can pull some weight. the extra batteries reduce the pull but the all wheel drive ones with an electric motor on each axel will pull a lot. and when it is un hitched you will get around 30 mpg as apposed to say 16 or less. v6 eng my salesman said when he first climbed into one and floored it he sank into the seat.
If you were thinking of putting one on my car I would suggest a 3 wheel trailer, I have seen 2 setups with a wheel in center front. No weight on the bumper.
Like the popular four-cylinder Prius gas-electric hybrid, the 3.3-liter V6-equipped Highlander Hybrid will be powered by a new version of Toyota's Hybrid Synergy Drive powertrain. The system was specifically developed to meet the load-carrying requirements of a mid-size SUV. The system features a larger-capacity battery that will deliver nearly double the power of the battery in the Prius. An all-new high-speed electric motor will operate at twice the speed and deliver more than twice the power as the motor in the Prius. With combined peak-system power projected at approximately 270 horsepower, the new system will improve upon the V6 Highlander's already impressive less-than-eight-second zero-to-60 acceleration. In addition to providing the fuel economy of a four-cylinder compact sedan, the Highlander Hybrid will offer the versatility, refinement, and comfort demanded in a mid-size SUV. Highlander Hybrid will come standard-equipped with front-wheel-drive and offer electric four-wheel-drive with intelligence (4WD-i). Models with 4WD-i are equipped with front and rear electric motors that will deliver balanced power to all four wheels, providing instantaneous acceleration.
http://www.toyota.com/vehicles/minisite ... index.html
Ford has a SUV as well but I dont know how far it will go I know of a Prius with 300,000 miles
also try
4wheeldrive.about.com/od/hybridcarselectricvehicles/
Thanks for asking