Plower, I'll venture a guess that you will NOT have too much tongue weight, but notice I said I'm guessing without seeing what you have. I can tell you what I'd do if it were me, and you'll have to decide for yourself. I'd stand a yardstick against the rear bumper on the truck to see how high it is off the ground. Then I'd hook up the trailer and see whether it had changed or not, and if so how much. Then I'd drive the tractor onto the trailer and measure again. I'd also be looking to see if the truck and trailer looked like they were sitting fairly level front to rear. With the tractor (including front end loader and whatever you put in the loader) all the way to the front of the trailer, I'd want it to lower the back end of the truck no more than a couple of inches (1 to 1.5 preferably). If it's lowered more than that, I'd back the tractor up a little to shift some of the weight back, and then chain or strap it down when it looked right. But you DO want to put some weight on the tongue/hitch because it's very dangerous handling otherwise. As has already been stated, you want 10-15% tongue weight for it to handle right.
Bird