...So much GREAT information!
I have to chime in as I have a 1500 Laramie, 5.7 Hemi, and the 3.21 axle. Wife and I had a Roadtrek Class B van for a couple of years and wanted to switch to a trailer. So, we bought a 2015 Ram in 2019 and in the same year bought a Keystone Passport 23RB. About 27' total with a dry weight of 5800. Added Air Lift air bags to the rear coils, E rated tires, and a Curt TruTrak WDH. Pulls like a dream, etc.
So now we are 3 years into this rig and are considering getting something "a little bigger".
Here is what I found out. During a big multiweek road trip I pulled through a CAT scale, 2 times, to get hitched and unhitched weights. Going by the sticker on the truck, I was pretty much maxed out on payload. We laughed but when adding the weights - 2 passengers, 45 lb dog, 100 lb generator, 32 gallon fuel tank, tools, popup gazebo, lawn chairs, kayaks, etc, etc, we were on the edge. (put the dog on a diet!)
I think I could "get away" with pulling heavier but maybe not. IF WE STAY with the current setup we'll be fine. I keep saying though - "new RV...then bigger truck". Easy to see in campgrounds as we walk around - lots of 3/4 and 1 tons.
I'll cast my vote for getting the 2500.