Regal You can tow any of the three trailers you picked safely and comfortably with your truck. You are on the right track with getting a WDH with built in sway control to safely set up your load and stop any sway before it would start. Additionally
quality air bags like the Timbergroves or even the Sumo neoprene springs provide support for better ride & suspension control especially over rough road. Not that they would be required here but they make the package and experience better even safer. $379 or $249.
I have a transport business and transport TTs for the Mfgrs with a 14 Ram Ecodiesel. Plants to dealerships sometimes dealerships to plants sometimes dealerships to customers. Seven years 775,000 miles 12 months a year 47 of the 48 continental states. No accidents many scale houses no tickets or fines.
For safety and stability, set up IE axles and tongue weight is key and primary.
Practically speaking payload is at best with CVWR a very distant 2nd even though it is generally the first number exceeded and unfortunately the focus of so many. Not that a person should run grossly over payload that is not what I am saying. I am saying keep the main thing (safety & stability) the main thing, focus on safe set up. When you see TT accidents its root cause is almost always a combination of poor setup and going too fast for the conditions. Never have I seen it from being over payload. In practicality the payload number has largely become CYA for the Mfgr.
So how do you concretely set up your truck and trailer for stability ie safety. First weigh just your truck. You need the steer axle weight and the drive axle weight and naturally together they provide the total weight. CAT scales weigh all three axles independently at one time to see what the eyeball or measurement cannot. That is steer axle, drive axle, and trailer axles. These are the things DOT and scales houses are concerned with FOR safety both for handling and stopping. Gross vehicle weight aside from this but not beyond the combination of these is for determining what they should pay for road use for the damage and wear they put on it. For pick ups etc and travel trailers WDH measurements alone are fine when you are not close to maximums and just want to get it within the zone so to speak. CAT has a free app with GPS locator you can likely find one close to you or on route to a camping destination. Often it's like $12 for the initial weigh $2 per additional so for less the $20 you can set up your rig for maximum stability & safety.
For estimates you can take the dry weight of your TT and add 1,000 pounds as thats most common as to an actual wet weight. Batteries propane minimal water & supplies. For example for your truck lets say your steer is
3,200 and your drive
2,500 with you in it and lets say you load your heaviest trailer to its max GVWR of 7,200.
Ok if you put wife & son in the cab and the load the bed of your truck totaling 500 pounds and she loads the front of the TT again to its gvwr no WDH or loading adjustments. TT tongue weight on its own scale not overloaded might be 1080 or 15%. You roll on CAT scale front of the truck high back of the truck low and it would show something like this.
2900 steer
4380 drive
7280 total
6120 trailer
13400 CVW
This leaves you 380 pounds over GVWR and far worse a reduced steer weight, an over the axle drive weight, and tongue weight at the top of recommended. This might not be far enough off to be white knuckle but it would not be stable or relaxing to drive. Swerve around someone pulling out in front of you and you may end up backwards upside down in the ditch. Jam the brakes and find their is too little weight on the steers and she wants to slide instead of stopping in the distance it should. Passing semi truck bow wave makes your truck and trailer wiggle like an accordian.
Now your experienced friend is there and helps you redistribute your weight. He shoves stuff tight to the cab. Repositions some of the camper loading from the nose to over the axles. Then adjusts your WDH and re weights. Likely he has to adjust the WDH more than once as its the first time and dialing the load in so to speak. Finally he ends up with
3200 steer
3860 drive
7060 total
6340 trailer
13400 CVW
This adjustment still leaves it 160 pounds or 2% over GVWR but more importantly it replaced unloaded steer weight for stability and stopping ability. It also brought his drive axle weight below max and again improved stability together helping restore COG center of gravity and to suspension design. The numbers would be cleaner so to speak if we didn't add passengers or gear to the truck. Then we would see tongue weight came down from 1080 or 15% to 860 or 12.0%. Which still comfortably makes for a stable non sway inducing tongue weight for a TT at 65 mph without putting more weight on the truck then necessary. Swerve around someone now and find much better stability. Hit your brakes hard find out it stops in less distance. Semi truck passes close and the bow wave now only pushes you to the side a little with the truck and trailer feeling almost like one solid unit. Now this same truck and trailer can be driven with two fingers instead of two hands.
This is the stuff that should be talked about in these threads IMO. Knowledge & respect for the weight. Max steer axle, drive axle, max receiver, CVWR and yes GVWR. WDH adjusting weight redistribution. Not fear and stacking up weight guesstimates towards some thought to be magical payload sticker number. My 2 cents.
https://timbergroveenterprises.com/old-home
https://www.supersprings.com/shop/ssr-307-47/