Where you don't want to be, is very close to, or over your GVWR of 7100 lbs.
Forget about tow capacity rating numbers. You will run out of payload, before you get close to max tow ratings.
Your payload (occupant / cargo weight) is capacity you have to carry everything and everybody in, or on the truck. It also includes, anything added (bed liner, bed cap, etc.) to the truck, since it left the factory, a weight distribution hitch, and trailer tongue weight.
Average loaded trailer tongue weight (sometimes referred to, as hitch weight) is 12 - 13 percent of loaded trailer weight.
Average camping load (dishes, bedding, camp chairs, BBQ, groceries, water, etc) is 800 to 1000 lbs.
To get an accurate payload, take the truck to a scale. Subtract it's actual weight from 7100 GVWR. The remainder is your actual payload. Then, from your payload, subtract family weight, subtract planned truck cargo, and subtract 100 lbs for a WD hitch. What you have left is available for trailer tongue weight. Divide that number by .13. That will give you a ballpark of what loaded trailer weight, will max out your GVWR.
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Example:
GVWR 7100
Actual truck weight 5480
Actual payload (7100 minus 5480) would be 1620
Family, cargo, and WD hitch weight 850. (1620 minus 850) Would leave 770 lbs available payload.
Divide 770 by .13 = 5923 lbs loaded trailer, would put you close to max weight.
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If you want a built in cushion, reduce that available payload number, before calculating loaded trailer weight.
Trailler sales people will try to sell units with unloaded weights that fit into your numbers. Don't listen to them. Soon as you load that trailer, you will be over weight.
Look at units with GVWR that fits in your numbers.
