YEAH.....Ford list MAX Payload as 3595
BUT your truck has a GVWR of 8800#
Weigh truck with you, any passengers, full fuel tank and any stuff you would carry in cab........subtract that number from the 8800# GVWR.
That is how much you can load into truck...way short of that 3595# published payload
Artic Fox 865's dry weight is 3,236lbs and wet is 4,254lbs. This is for a base model without any options and those will also add weight. Then throw in you gear,clothes, tools, yourself, etc and the weight will climb up there.