There are tunes out there that will wake them up a lot... removes the dead pedal and a lot of the torque management BS. A 4500# trailer shouldn’t be an issue whatsoever, I towed plenty of heavy shit with a 2500 ‘burb with 3.73’s and it never felt taxed. We tow fucking skid steers around with 6.0 trucks, a small camper shouldn’t be an issue.