if NOT carrying heavy loads in rear will affect TW in a negative way
Good question and you should be commended for thinking through this issue. The short answer is 'yes' the tongue weights will be more as a percentage of total weight as most toyhaulers are designed to carry the toys to even out or balance the weights. However, less weight overall typically means less tongue weight even though the front/ rear bias might be a little heavier in front. Have enough truck payload and you should be good to go.
