You will definitely be over GVWR and likely the RAWR. Tow ratings are pretty useless when it comes to 1/2t trucks. You will almost always max out on payload well before getting anywhere near the tow rating. This is why fivers don't go well with 1/2t trucks.
At 6600lbs dry you will easily be 8k once loaded up. Using the minimal 20% of that on the pin will be 1600lbs. Add another 200lbs for the hitch in the bed and you are already 400lbs over weight before you or your passengers get in the truck.
If you want a fiver, get a bigger truck. If you want to keep the truck, you'll get much more trailer in a bumper pull.
'17 Ram 2500 Crewcab Laramie CTD
'13 Keystone Bullet Premier 310BHPR
Hitched by Hensley