I wouldn't tow on 6 just due to the strain on the axles pulling weight and the angle they will be at. Don't have my manual handy but I think 1500 lbs is the towing capacity they are rated for though and I don't think you'll have a problem. Have pulled SXS's weighing 1200 lbs plus two occupants out of stuck situations before with no problems.
I pulled a trailer full of split firewood around my yard and it weighs maybe close to 1500. It can be done just make sure you have it in low and also 4x4 or the rear tires might just spin. I did this with my 500