Heavy Tongue Weight on Toy Hauler

Was your water tank full? Perhaps you can empty that and lower the hitch weight a bit.

The designers are thinking "Someone might load 2,500 pouns of toys 6' behind the axle, so we need to have a heavy hitch, so that after they load it up with whatever, it will still have at least 1,000 pounds of hitch weight. I think they went a little overboard with hitch weight though. To adjust, the designers really needed to place the rear axles a little closer to the hitch, so that more of the trailer weight is behind the axles, and you will then have much less hitch weight.

Not much you can do about it now, except the common sense things, like put the heavy stuff in the back. If the water tank is forward of the axle, do not fill it and check the weight again.

Do you have a fuel system? Is that behind or in front of the axles?

What tanks are behind the axle? Can you fill them - at least part way? IF they are between or near the axle, then that weight will not really matter much.

Sounds like what is happening is proper - putting more weight in the back is lightening your pin weight on the truck, which is a desirable thing.

Have you tested the results from having empty water and waste tanks and fuel tanks?

Generally, shifting weight to the rear of the trailer will reduce the pin weight and help your situation.

What about when its full of water/toys?

Yes form rear door to axles

Are the toys loaded in the extreme rear?