kevin79 wrote:
The GVWR of the van?
The payload rating. The drivers door should have a tire loading sticker that says "the combined weight of occupants and cargo should never exceed xxxx". That is your payload. It is the amount of weight of everything that can be added to the vehicle, including tongue weight, before you exceed the GVWR.
If you don't have that sticker I would suggest loading the van up with everyone and going to a scale. Subtract the loaded weight from your GVWR and what you have left is the remaking payload for the tongue weight.
Figure tongue weight to be around 13 percent of the loaded trailers weight.