wing_zealot wrote:
Tongue weight should ideally be 12% of the trailer weight (10% minimum). So 762 divided by 12% = 6350 lbs (trailer weight fully loaded and traveling down the road ready to camp). Clicky - Non-biased, reliable information
Agreed, I would treat the 6350 as max GVWR on the trailer as a starting point for trailers to consider.
If you want to get a better idea, go down to your local truck stop loaded as if you were going to hook up the trailer and weigh the truck (put the family, full tank of gas and all the gear you would take in the truck). That will give you both overall weight and per axle weight, so no guessing how much payload you have remaining. It's easy, will cost $12-14.
PS: transposing the payload to 1600lb doesn't leave you a towing power house but makes it a lot more viable to pull a travel trailer in the 20-26ft range.