TOYOTA 2010 Camry - Manual (Page 209)

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2-5. Driving information
Towing a trailer
Contact your Toyota dealer for further information about additional
requirements such as a towing kits, etc.
Hitch
Trailer hitch assemblies have different weight capacities established
by the hitch manufacturer. Even though the vehicle may be rated for
towing a higher weight, the operator must never exceed the maxi-
mum weight rating specified for the trailer hitch.
■ Trailer tongue load
The trailer cargo load should be distributed so that the tongue
load is 9 to 11% of the total trailer weight, not exceeding the
maximum 100 lb. (45 kg). (Tongue load / Total trailer weight x
100 = 9 to 11%)
The total trailer weight and tongue load can be measured with
platform scales found at highway weighing stations, building
supply companies, trucking companies, junk yards, etc.
Total trailer weight
Tongue load