2016 Coachmen Apex 23LE - First Trailer

Thanks to everyone for their responses thus far I really value your contributions, my families safety is not something we would ever take lightly. Truth be told - matching the towing vehicle to the travel trailer has been an exercise in patience, learning and frustration. We've never taken the word of RV salesmen (several of whom have tried their hardest to sell us TT's well in excess of 5k lbs, in such cases we immediately ask to speak with another rep) and ultimately dropped to the Apex in large part to its light weight and reputation for quality. Originally we'd wanted to purchase the Bullett 243BHS but the weight was simply too much of a concern. The 2015 Durango's (with tow package) are geared differently, have heavy duty cooling systems built in and heavy duty rear ends with built in sway control. To support the TT purchase we added in a w/d hitch with 4-point sway control and will have electric brakes on the trailer. With the w/d hitch in place, how best should I go about calculating the tongue weight and its placement? Does it go into the payload for the Durango or spread out in equal parts to the TV and TT? The wife and I will be picking it up this weekend and immmediately heading over to a certified scale for exact measurements. Thanks to all for their input.