Your 1,436 lb payload seems reasonable so let's assume it is right.
Empty trailer is 6,400#. Assume loaded trailer is 7,400#. Tongue weight is about 750 to 800# or so. Let's use 800#. You are now down to 636# of payload.
Next subtract weight of the WD hitch. If I use my old equalizer with bars, the total weight was about about 80#. You are now down to 556# of remaining payload.
If you only carry a minimal 50# of jacks, tools and other misc cargo in truck or truck bed you are now down to about 506# of remaining payload for 4 passengers.They had better be small people averaging about 125# each.
Point is you will probably be above your GVWR by a couple of hundred lbs, which is certainly not that big of a deal, but you should recognize this and load lightly with minimal stuff inside the truck. Pack as much as possible in trailer and not truck.
The bigger issue is if you are over your rear axle weight rating (RAWR). I don't know what that is for your truck but it is often the total of the 2 rear tires weight rating. You do NOT want to be over your RAWR. Only way to know is to fully load everything and go weigh it at the CAT scale. If your people are all under about 200# on average, I suspect you will be slightly above your GVWR but close to or slightly under your RAWR. There is no way of knowing other than to weigh it at a CAT scale. Many truck stops have CAT scales and it only costs about $10 to weigh it.
Hope this helps. Good luck and enjoy. Keith