Chevy 1500 vs 2500

Your tires are "P" (passenger) rated. What the other poster was saying is that "LT" tires may be a better choice for towing. P rated tires have softer sidewalls for rider comfort while the LT tires are stiffer and won't flex as much with a load on them. You might make your truck a better tow vehicle but my opinion is that it is overmatched by your TT. We started towing our 2003 Pioneer 19T4 with a '99 Mountaineer. It got us to the campground but it was white knuckle at times despite having LT tires, super springs and a weight distributing hitch and sway control. Traded it for a '99 F250 Superduty and towing became much easier even after we ugraded to a much larger TT later. Proper setup is a must!

PS what the salesperson told you is the first thing they teach all RV salespeople to say regardless of the type of vehicle.

I agree with downtheroad's post above. You could possibly improve the ride a bit if all the setup details were perfectly setup, but with that amount of weight/load, then you may still have a rough ride regardless due to the capacity of the truck.
I pulled a ~6k loaded TT with a Silverado 1500 for a lot of years. The WDH was set up well, and when I switched the stock P tires to LT load range D, I noticed a lot of improvement and it did just fine, but it was still night and day when we finally upgraded the truck to a 2500.
If you decide to stick with the 1500, check out the points DTR listed, (particularly the WDH setup). Otherwise, I'd say a 3/4 ton truck would definitely be a step in the right direction.
IMHO, although a long bed is always recommended for stability over a short bed, the "standard" (6.6') bed Chevy's do fine, especially with the added length of the quad/crew cabs. My 1500 was a standard bed quad cab and the 2500 is a standard bed crew cab
Best of luck.

PS - my DW was against upgrading the truck too. She didn't understand why if the 1/2 ton did the job fine. After we upgraded she finally understood. And frankly, there's a safety factor as well.

Our TV has a standard Chev truck bed (79.2”). I guess they do make a long bed (97.6”).

As far as the shocks, the Chev is a 2016 so the shocks should be good.

The tires are P265/65R18. So when you say soft P rated tires, is this what you are referring to?

And thanks for the replies…

I’m with downtheroad on the ride issues. You are not set up correctly and your wheelbase is too short for a 34 foot TT. “I was told by the dealer...” lol

Sounds to me like your wheelbase is too short more than the size of the truck. The trend today is a short box / short wheelbase and the closer the front axle is to the rear axle the choppier the ride is (in most cases). I pull with a 4 door long bed truck and I'd never even consider any pickup with a short box.

One, I like the added room of the 4 door and two, I use the 8 foot box all the time.

There may be other factors involved but I believe your wheelbase is too short for starters.

GVWR 9,000 Lbs
Dry Weight 6,896 Lbs
Hitch Weight 810 Lbs
Width 8' 0"
Height 11' 2"
Length 33' 11"

If I have the numbers correct??? My opinion, you are really pushing the limits of your 1500. Bunk house...probably a family and lots of gear in the trailer and in the bed of your truck also...

But, the bounce you are describing could be from lots of different reasons..Soft P rated tires, improper hitch set up, worn out shocks, etc....??