One important (IMO) consideration is since you are going diesel is to be sure your vehicle is equipped with an engine brake. If your travels ever take you to mountains or even rolling hills you will be very happy you got it. Not all “towing/camper” packages include that.
Towed 38’ 5th Wheel with both 3/4 ton gasser and 1 ton oil burner .. diesel a “must” with larger trailer
Completely agree with above sentiment.. settle on the camper 1st then the tow vehicle