well...i have the same tow capacity / gears / engine as you and I tow my 6k-6.5k lbs 30ft TT with a tongue weight of 750lbs ish. With a WDH the truck did perfectly fine...though to be fair I recently put on the cargo max rear springs and was a MASSIVE improvement over the airlift bags in the oem springs. I still have the bags in but havent inflated them since as theyre just not needed unless im putting the maximum available payload in the bed its self.
The truck stays in 7th nearly the entire trip on flat terrain and handles inclines without any problems at all. Breaking is great, even in high winds and bad weather. I get the normal 9-11mpg depending on the weather, driving speed, terrain, ect. but EVERY tow vehicle ive had gets basically the same mpg while towing..regardless of the engine. I recently had the unfortunate/fortunate experience to have my truck in the shop for a couple months and had to rent several trucks for camping trips. I pulled with a 3500 diesel, 2500 diesel, and a 2500 v8. The 2500 diesel was my favorite when it came to power, but the two 2500s pulled way nice than the 3500. More comfortable and just felt better overall. With the cargomax springs this 1500 now feels just like the 2500 did while pulling, planted and sturdy while not being over spongy or over stiff. But the the truck still drives like the regular 1500 while unloaded.
You could always look at the cargomax rear springs that are designed for the ram since they give 2" of lift in the rear. Theyll give you the height you wanted and more capability.
The 1500 will be fine for you.
But...there is a difference between fine and perfect. And a 2500 is always the perfect answer
If I hit the lottery today ill be buying a 2500 with a 6.4 in it.
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