I have a 2016, which is no different than a 2019.
Are you towing with the 3.6 or 5.7 ?
3.6 is limited to 40 sq-ft frontal area vs 60 sq-ft for the 5.7
Also make sure to get the factory tow package. You’re limited to 3,500 lbs towing without it. Realistically the 5.7 can get by without it, but not the 3.6
I pull a dry weight 5300 lbs (7000 GVWR) Coachmen. The 5.7 V8 Hemi & ZF 8HP70 (8-speed) are a great combination. I’ve had it just about maxed out , (weighed 12,980 lbs against its 13,100 GCWR). It handles the weight just fine.
Don’t let the misleading payload door sticker deter you. The 5.7 Durango has significant available payload of around 1,700 lbs. (7,100 lbs GVWR minus 5,400 curb weight). The limiting factor is the rear GAWR of 3,900 lbs.
A good WDH with away control is a must. I use an Equalizer E4 with 1k bars. Looks like your TT is only 23’ long, that should handle great with a proper setup.