Two sleds and an open 2 place trailer is not going to be any more weight than a bed of lumber or drywall. I'd go for it. You're well under 2000 pounds. I have a friend that took his Chevy with under 500 miles hooked it on a trailer in MI and ended a hunting trip to Wyoming 3000 miles later. The truck never suffered any problems.....he's a builder and used his truck too.

-jeff b.