A little further comment on all this, I would default to my normal comments that taking the truck and trailer to a scale is the only way to know what a person is really dealing with. Anything else is just guessing.
Having said that, I looked up the OP's trailer and see that it has an advertised dry weight of approx 4400 pounds.....so "if we were to guess", real world, ready to go camp with pretty much dry tanks ( fresh, gray, black ), I am going to say it's likely between 5500 and 5900 or so, with probably between 650 and 800 tongue weight.
But again, a half hour spent at the CAT scale doing three passes is where I would want to start, so that honest, educated numbers could be applied to the idea of tire/wheel/suspension loads.
