So I would be hesitant to pull that much weight with that small of a motor. I am pulling a Grand Surveyor 273RL fifth wheel and I have a 1500 with the good old 5.9 L gasser.
It seems to have the power but it just does not seem to be enough truck for the weight GVWR for the trailer around 8200lbs. I am in the same boat wanting a bigger truck but camper purchase slows that down. I will be adding some air bags to my truck to level the weight out some but the motor/trans will be your issue more than the truck suspension part.
But we all have opinions!!!
2003 Dodge Ram 2500 QC SB 4x4
Edge Juice w/ Attitude
2005 FR Grand Surveyor 273RL 5er
B&W Turnover ball
B&W Companion (5er attachment)