Complete proteins: meat, egg, dairy
incomplete proteins, everything else

you can make a vegetable protein complete by adding a bee pollen extract that has the missing amino acid, nor sure of the name

20% is a good number after a day of backpacking, when you get home is when a complete protein would be real important for muscle recovery.
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"In the beginers mind there are many possibilities, but in the expert's there are few."
Shunryu Suzuki