If you get a 2020 GMC or Chevy 1 ton Duramax SRW you don't need a dually. Duallys are a pain for anything other then towing a huge trailer. They are a pain to park, maneuver in traffic and burn more fuel.
A 2020 GM 1 ton SRW would easily handle your trailer and the camera system is fantastic. My Cyclone 3600 (17,300 when loaded) tows fantastic behind my 2020 Denali duramax. Its like the trailer is not even there. My wife will even drive it and she's not an adventurous driver. I did add a Demco 21,000 slider and a 5th Airborne 21,000 pin box.
5th wheel towing capacity - 21,500
payload capacity - 4,185
GCWR - 29,700
curb weight -7,548
With your GVWR of 16,000 plus GM 1 ton curb weight of 7,548 = 23,548 you have a 6,000 lbs to spare.
Cyclone 3600 specs:
Max GVW : 17,000
Dry wt: 15,400
Dry hitch: 3375
CCC: 1552
Based on the trailer weights alone and from the partial scale weights given, over on trailer max, assuming full of fuel & dressed up w/ add ons/options/people, truck weighs more than 7548, add at least 800# to dry hitch---now at 4175. Zolman, you need to provide more weight stats because from what I see, things are not adding up right.