My experience is that the new generation 1/2 ton trucks do well with something in the 24-25 foot range weighing about 7,000 lbs MAX when fully loaded.
Having said that, I towed the trailer in my sig (35 ft, 8500 lbs max) for a while with my old 2007 Tundra with the 5.7 V8. I did "OK" but I knew it was a bit much for the 1/2 ton (even thought this trailer is advertised as "1/2 ton towable") so I upgraded to the 2500 Ram in my sig for extra margin and the fact I wanted to sell the Tundra at about 100K miles anyway to get the max value. Otherwise, I loved the old Tundra, best truck I ever owned. Hopefully the new Ram will be as good and reliable.
It all comes down to what you're comfortable with.
