When loaded for camping the trailers will weigh approximately 1000 lbs (this is an average) more than their unloaded weights. Their tongue weight will be approximately 12.5 (this is average) percent of loaded weight.
Add 100 lbs (WD hitch) to the loaded tongue weight. The total will be the approximate amount of payload needed to support the weight from the trailer.
Your payload is your capacity to carry the combined weight of any aftermarket accessories that have been added to the truck, people / cargo in or on the truck, and trailer weight. This is where you want a little cushion. Up to you to determine how much.
Example:
Say your truck has 1700 lbs (yours may not be this high) payload available. Your total weight of people and cargo, is 600 lbs. You would have 1100 lbs payload available for tnongue / hitch weight.
Say your loaded trailer weighs 6000 lbs (6000 x .125) = 750 lbs
Add 100 for the WD hitch. You would need 850 lbs of available payload.
1100 lbs available payload minus 850 lbs tongue / hitch weight = 250 lbs cushion
Best way to get your actual payload:
1. Fill up the gas tank and weigh the truck.
2. Look up your GVWR. Check owners manual, tire / loading sticker on drivers door post, or online.
3. Subtract your actual weight from GVWR. The remainder is your available payload. That's the number you start subtracting from. Everything and everybody (except those who were in the truck on the scale) you put in or on the truck.
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