Swaying to the music

Can you be more specific when you say Reese hitch with 1200lb bars? Is it a dual cam system? Do you have friction sway control?
Yes a lot of sway can be exaggerated by improper balance. If you have a dual cam setup that is not set correctly it can also sway. Did you add the bike rack after the hitch without readjusting?

Ever hear the saying "the tail wagging the dog"???

I can't see my reply but yes dual cam hitch set up. No never adjusted after bike rack but did after new truck.

I would argue the "plenty of tow capacity" statement, but your issue is probably not enough tongue weight.

11500 capacity according to the manufacturer but that's another discussion and I was think not enough tongue weight but was wondering if I drop my ball height if that would help any

Read this;
Weight Distribution (WD) Hitch --- How it Works

and this;
Travel Trailer Hitch Set-up Procedure

then adjust your hitch and get back to us if it isn't fixed.

I had a TT with the same issues..... I placed 2 friction bars on the hitch and that helped... Then I removed the bikes and it all went away.. TOO much tail weight with not enough tongue weight , is what it sounds to me...

$14 at a CAT Scale for 3 passes.

Truck alone
Truck with TT without WD
truck with TT with WD

That will tell you how much TW you have, balance and how well the WDH is adjusted. No speculation needed.

If you have the Reese dual cam, the system is picky about adjusting such that the detents in the bars are centered over the cam lobes when going straight. Etrailer has a decent video detailing a good way to adjust it, except the front axle weight/height should be returned to unhitched amount.

ah64id wrote:
I would argue the "plenty of tow capacity" statement, but your issue is probably not enough tongue weight.

x2

AKLIMEK wrote:
11500 capacity according to the manufacturer but that's another discussion and I was think not enough tongue weight but was wondering if I drop my ball height if that would help any

Tow capacity on paper has little to do with realistic tow capacity, especially on a 1/2 ton.