Travel light? Just pack it how you want it.
My truck for comparison has 3100 on the rear axle 'empty'. That leaves you with 3k worth of tire. Truck empty is 7900 (full fuel, driver, toolbox, and tonneau). My trailer has a 1k tongue ready to camp minus toys. Load my wife and 2 kids, generator, wood, extra fuel, misc... 9k is out of the picture. Shoot, I've had 2500lb worth of gravel in mine, but I will admit with that weight the suspension does need a little help with support.
If you are trying to stay under GVWR, it isn't going to happen with that combo. Just remember the difference in a 3500 of our era truck is the rear spring pack.