thanks for the tip, i just made a trip (160 miles round trip) without using the tow/haul engaged, pulled smoother and actually got better gas mileage. Got to the scales on the way home, packed same way as going out except for the consumed food and drink. Only got one weight in at the scales, heat index was in the triple digits, will try again later for all three. but this weight were:
front axle: 3000
rear axle: 3440
trailer axle: 4480
Gross: 10920